| Rank | Population Density ▼ | School District / Population |
| 1. | 20,009.2/sq mi | Berwyn North School District 98 / 26,086 |
| 2. | 13,799.9/sq mi | Cicero School District 99 / 84,481 |
| 3. | 12,030.4/sq mi | Elmwood Park Community Unit School District 401 / 24,960 |
| 4. | 11,792.6/sq mi | Berwyn South School District 100 / 30,676 |
| 5. | 11,602.1/sq mi | Chicago Public School District 299 / 2,712,608 |
| 6. | 11,060.5/sq mi | Oak Park Elementary School District 97 / 51,988 |
| 7. | 10,238.0/sq mi | J. Sterling Morton High School District 201 / 159,527 |
| 8. | 9,537.5/sq mi | Chicago Ridge School District 127-5 / 13,466 |
| 9. | 9,325.1/sq mi | Evanston Township High School District 202 / 83,353 |
| 9. | 9,325.1/sq mi | Evanston Community Consolidated School District 65 / 83,353 |
| 11. | 8,967.5/sq mi | Pennoyer School District 79 / 5,894 |
| 12. | 8,805.2/sq mi | Oak Park and River Forest District 200 / 63,199 |
| 13. | 8,703.2/sq mi | Skokie School District 69 / 18,561 |
| 14. | 8,546.5/sq mi | Union Ridge School District 86 / 6,529 |
| 15. | 8,244.6/sq mi | Maywood-Melrose Park-Broadview School District 89 / 44,483 |
| 16. | 7,817.5/sq mi | East Maine School District 63 / 46,677 |
| 17. | 7,127.4/sq mi | Ridgewood Community High School District 234 / 19,122 |
| 18. | 7,117.1/sq mi | Brookfield School District 95 / 10,872 |
| 19. | 6,971.2/sq mi | Oak Lawn-Hometown School District 123 / 35,152 |
| 20. | 6,934.7/sq mi | Bellwood School District 88 / 23,074 |
| 21. | 6,788.7/sq mi | Oak Lawn Community High School District 229 / 40,564 |
| 22. | 6,461.2/sq mi | Norridge School District 80 / 12,089 |
| 23. | 6,302.6/sq mi | Evergreen Park Elementary School District 124 / 19,924 |
| 23. | 6,302.6/sq mi | Evergreen Park Community High School District 231 / 19,924 |
| 25. | 6,233.6/sq mi | Skokie School District 73-5 / 9,719 |
| 26. | 6,064.5/sq mi | Skokie School District 68 / 20,236 |
| 27. | 5,941.9/sq mi | Lincoln Elementary School District 156 / 7,611 |
| 28. | 5,850.8/sq mi | Aurora East Unit School District 131 / 84,673 |
| 29. | 5,787.9/sq mi | Forest Park School District 91 / 14,010 |
| 30. | 5,761.8/sq mi | Queen Bee School District 16 / 17,773 |
| 31. | 5,606.3/sq mi | Ridgeland School District 122 / 21,499 |
| 32. | 5,549.6/sq mi | Westchester School District 92-5 / 16,049 |
| 33. | 5,464.5/sq mi | River Grove School District 85-5 / 7,881 |
| 34. | 5,456.9/sq mi | Wilmette School District 39 / 26,102 |
| 35. | 5,454.9/sq mi | LaGrange School District 102 / 25,438 |
| 36. | 5,409.6/sq mi | Maercker School District 60 / 18,009 |
| 37. | 5,193.5/sq mi | Maine Township High School District 207 / 146,026 |
| 38. | 5,174.1/sq mi | Proviso Township High School District 209 / 126,972 |
| 39. | 5,147.3/sq mi | Calumet City School District 155 / 11,610 |
| 40. | 5,076.6/sq mi | Dolton School District 149 / 27,206 |
| 41. | 5,059.2/sq mi | Park Ridge Consolidated Community School District 64 / 40,764 |
| 42. | 5,046.7/sq mi | Arlington Heights School District 25 / 51,105 |
| 43. | 5,023.2/sq mi | Niles Township Community High School District 219 / 96,278 |
| 44. | 4,920.6/sq mi | Franklin Park School District 84 / 11,086 |
| 45. | 4,895.3/sq mi | Villa Park School District 45 / 36,938 |
| 46. | 4,888.2/sq mi | Berkeley School District 87 / 22,520 |
| 47. | 4,877.7/sq mi | Indian Springs School District 109 / 24,678 |
| 48. | 4,826.5/sq mi | Mount Prospect School District 57 / 20,638 |
| 49. | 4,757.5/sq mi | Lincolnwood School District 74 / 12,653 |
| 50. | 4,715.0/sq mi | Lindop School District 92 / 4,011 |
| 51. | 4,689.8/sq mi | Riverside Brookfield Township School District 208 / 29,204 |
| 52. | 4,658.8/sq mi | Darien School District 61 / 16,179 |
| 53. | 4,620.9/sq mi | Morton Grove School District 70 / 9,241 |
| 54. | 4,614.8/sq mi | Dolton School District 148 / 22,436 |
| 55. | 4,583.2/sq mi | Kenilworth School District 38 / 3,006 |
| 56. | 4,534.7/sq mi | Worth School District 127 / 11,338 |
| 57. | 4,525.8/sq mi | River Forest School District 90 / 11,211 |
| 58. | 4,520.3/sq mi | Park Forest School District 163 / 15,658 |
| 59. | 4,520.0/sq mi | Calumet Public School District 132 / 10,701 |
| 60. | 4,504.0/sq mi | Midlothian School District 143 / 15,241 |
| 61. | 4,475.8/sq mi | East Prairie School District 73 / 4,698 |
| 62. | 4,453.4/sq mi | Schiller Park School District 81 / 13,509 |
| 63. | 4,425.9/sq mi | Lyons School District 103 / 22,581 |
| 64. | 4,405.5/sq mi | Harvey School District 152 / 16,747 |
| 65. | 4,400.6/sq mi | Woodridge School District 68 / 33,075 |
| 66. | 4,392.4/sq mi | Lombard School District 44 / 35,594 |
| 67. | 4,319.2/sq mi | Round Lake Community Unit School District 116 / 36,177 |
| 68. | 4,292.9/sq mi | Waukegan Community Unit School District 60 / 83,647 |
| 69. | 4,274.5/sq mi | Schaumburg Community Consolidated School District 54 / 133,914 |
| 70. | 4,251.0/sq mi | Wheeling Community Consolidated School District 21 / 66,232 |
| 71. | 4,239.5/sq mi | Lansing School District 158 / 22,864 |
| 72. | 4,210.5/sq mi | Atwood Heights School District 125 / 7,926 |
| 73. | 4,048.6/sq mi | Cook County School District 130 / 30,726 |
| 74. | 4,000.9/sq mi | Marquardt School District 15 / 26,458 |
| 75. | 3,994.3/sq mi | Community High School District 218 / 121,995 |
| 76. | 3,960.9/sq mi | Thornton Fractional Township High School District 215 / 60,994 |
| 77. | 3,958.2/sq mi | Des Plaines Community Consolidated School District 62 / 51,990 |
| 78. | 3,952.9/sq mi | Westmont Community Unit School District 201 / 12,454 |
| 79. | 3,933.9/sq mi | Elmhurst School District 205 / 47,454 |
| 80. | 3,927.8/sq mi | Burbank School District 111 / 29,957 |
| 81. | 3,869.3/sq mi | Glen Ellyn School District 41 / 29,772 |
| 82. | 3,859.1/sq mi | Township High School District 214 / 253,649 |
| 83. | 3,811.5/sq mi | DuPage High School District 88 / 83,355 |
| 84. | 3,804.2/sq mi | Bloomington School District 87 / 44,445 |
| 85. | 3,802.6/sq mi | North Palos School District 117 / 28,444 |
| 86. | 3,787.9/sq mi | Township High School District 211 / 236,447 |
| 87. | 3,773.6/sq mi | Leyden Community High School District 212 / 64,439 |
| 88. | 3,772.5/sq mi | Skokie-Fairview School District 72 / 6,315 |
| 89. | 3,746.0/sq mi | Western Springs School District 101 / 10,072 |
| 90. | 3,698.9/sq mi | Keeneyville School District 20 / 14,535 |
| 91. | 3,687.6/sq mi | Joliet Public School District 86 / 83,967 |
| 92. | 3,673.9/sq mi | Kirby School District 140 / 35,585 |
| 93. | 3,673.0/sq mi | Prospect Heights School District 23 / 18,121 |
| 94. | 3,658.2/sq mi | Homewood School District 153 / 16,461 |
| 95. | 3,655.0/sq mi | Glenbard Township High School District 87 / 166,784 |
| 96. | 3,647.9/sq mi | River Trails School District 26 / 15,589 |
| 97. | 3,646.4/sq mi | North Chicago School District 187 / 29,043 |
| 98. | 3,557.2/sq mi | Riverside School District 96 / 13,991 |
| 99. | 3,543.2/sq mi | Reavis Township High School District 220 / 33,438 |
| 100. | 3,514.0/sq mi | Community High School District 99 / 110,458 |
| 101. | 3,487.1/sq mi | Mundelein Elementary School District 75 / 14,958 |
| 102. | 3,463.8/sq mi | Addison School District 4 / 38,180 |
| 103. | 3,456.0/sq mi | Hinsdale Community Consolidated School District 181 / 26,135 |
| 104. | 3,430.5/sq mi | Alsip-Hazelgreen-Oaklawn School District 126 / 17,417 |
| 105. | 3,404.9/sq mi | Palatine Community Consolidated School District 15 / 119,447 |
| 106. | 3,388.2/sq mi | Winnetka School District 36 / 12,008 |
| 107. | 3,357.6/sq mi | Hoover-Schrum Memorial School District 157 / 8,237 |
| 108. | 3,354.8/sq mi | Homewood-Flossmoor Community High School District 233 / 38,929 |
| 109. | 3,340.0/sq mi | West Harvey-Dixmoor Public School District 147 / 9,990 |
| 110. | 3,322.9/sq mi | Thornton Township High School District 205 / 114,889 |
| 111. | 3,318.5/sq mi | Argo Community High School District 217 / 40,495 |
| 112. | 3,314.0/sq mi | Forest Ridge School District 142 / 16,467 |
| 113. | 3,300.0/sq mi | Chicago Heights School District 170 / 24,090 |
| 114. | 3,296.6/sq mi | LaGrange Highlands School District 106 / 9,718 |
| 115. | 3,277.3/sq mi | Glenview Community Consolidated School District 34 / 41,222 |
| 116. | 3,270.0/sq mi | South Holland School District 150 / 10,183 |
| 117. | 3,256.1/sq mi | Mannheim School District 83 / 21,174 |
| 118. | 3,232.8/sq mi | Posen-Robbins Elementary School District 143-5 / 12,155 |
| 119. | 3,175.5/sq mi | Naperville Community Unit District 203 / 96,394 |
| 120. | 3,149.5/sq mi | Golf Elementary School District 67 / 6,857 |
| 121. | 3,107.6/sq mi | New Trier Township High School District 203 / 60,357 |
| 122. | 3,102.4/sq mi | Niles Elementary School District 71 / 7,998 |
| 123. | 3,096.4/sq mi | Rhodes School District 84-5 / 4,870 |
| 124. | 3,064.4/sq mi | Downers Grove Grade School District 58 / 51,933 |
| 125. | 3,037.0/sq mi | Bremen Community High School District 228 / 94,083 |
| 126. | 3,032.8/sq mi | Aptakisic-Tripp Community Consolidated School District / 19,061 |
| 127. | 3,023.6/sq mi | Rock Falls Elementary School District 13 / 8,878 |
| 128. | 2,964.7/sq mi | Community Unit School District 200 / 78,843 |
| 129. | 2,962.0/sq mi | Roselle School District 12 / 6,654 |
| 130. | 2,959.9/sq mi | Flossmoor School District 161 / 21,927 |
| 131. | 2,949.0/sq mi | South Holland School District 151 / 13,930 |
| 132. | 2,943.1/sq mi | Lyons Township High School District 204 / 69,702 |
| 133. | 2,938.4/sq mi | Community Consolidated School District 93 / 35,313 |
| 134. | 2,937.6/sq mi | Matteson Elementary School District 162 / 25,667 |
| 135. | 2,919.1/sq mi | Lockport School District 91 / 6,640 |
| 136. | 2,893.8/sq mi | Community Consolidated School District 59 / 66,255 |
| 137. | 2,794.9/sq mi | Prairie-Hills Elementary School District 144 / 22,837 |
| 138. | 2,787.6/sq mi | School District U-46 / 233,909 |
| 139. | 2,784.4/sq mi | Bensenville School District 2 / 19,900 |
| 140. | 2,761.5/sq mi | Hawthorn Community Consolidated School District 73 / 30,575 |
| 141. | 2,729.2/sq mi | Zion Elementary School District 6 / 17,432 |
| 142. | 2,712.9/sq mi | North Shore School District 112 / 35,827 |
| 143. | 2,704.8/sq mi | Indian Prairie Community Unit School District 204 / 128,486 |
| 144. | 2,694.5/sq mi | Glen Ellyn Community Consolidated School District 89 / 21,874 |
| 145. | 2,678.9/sq mi | Bloomingdale School District 13 / 13,521 |
| 146. | 2,654.3/sq mi | Community Consolidated School District 146 / 26,437 |
| 147. | 2,651.1/sq mi | Lincoln Elementary School District 27 / 13,053 |
| 148. | 2,646.3/sq mi | Peoria School District 150 / 101,620 |
| 149. | 2,639.7/sq mi | Bradley School District 61 / 13,139 |
| 150. | 2,637.6/sq mi | Northfield Township High School District 225 / 86,734 |
| 151. | 2,603.9/sq mi | Hinsdale Township High School District 86 / 75,716 |
| 152. | 2,578.9/sq mi | Komarek School District 94 / 4,969 |
| 153. | 2,574.3/sq mi | Lake Park Community High School District 108 / 50,869 |
| 154. | 2,563.8/sq mi | Arbor Park School District 145 / 12,821 |
| 155. | 2,549.8/sq mi | High Mount School District 116 / 4,027 |
| 156. | 2,535.3/sq mi | Taft School District 90 / 3,740 |
| 157. | 2,516.2/sq mi | Center Cass School District 66 / 11,561 |
| 158. | 2,513.7/sq mi | Aurora West Unit School District 129 / 75,509 |
| 159. | 2,495.9/sq mi | Fox River Grove Consolidated School District 3 / 4,266 |
| 160. | 2,495.3/sq mi | Salt Creek School District 48 / 8,237 |
| 161. | 2,478.1/sq mi | Fenton Community High School District 100 / 30,212 |
| 162. | 2,429.0/sq mi | Palos Heights School District 128 / 9,655 |
| 163. | 2,426.5/sq mi | Sunnybrook School District 171 / 10,897 |
| 164. | 2,424.0/sq mi | Northbrook Elementary School District 27 / 10,714 |
| 165. | 2,391.3/sq mi | Lisle Community Unit School District 202 / 13,791 |
| 166. | 2,373.1/sq mi | Summit School District 104 / 12,603 |
| 167. | 2,357.3/sq mi | Valley View Community Unit School District 365U / 92,995 |
| 168. | 2,357.1/sq mi | Township High School District 113 / 58,572 |
| 169. | 2,348.5/sq mi | Hazel Crest School District 152-5 / 8,175 |
| 170. | 2,325.4/sq mi | Deerfield School District 109 / 20,592 |
| 171. | 2,310.8/sq mi | Orland School District 135 / 56,257 |
| 172. | 2,304.8/sq mi | Diamond Lake School District 76 / 8,664 |
| 173. | 2,300.7/sq mi | West Northfield School District 31 / 9,898 |
| 174. | 2,232.3/sq mi | East Alton School District 13 / 7,620 |
| 175. | 2,205.4/sq mi | Northbrook/Glenview School District 30 / 10,256 |
| 176. | 2,149.5/sq mi | Glencoe School District 35 / 8,696 |
| 177. | 2,148.5/sq mi | Consolidated High School District 230 / 157,389 |
| 178. | 2,123.1/sq mi | Whiteside School District 115 / 12,608 |
| 179. | 2,112.3/sq mi | Northbrook School District 28 / 14,644 |
| 180. | 2,101.3/sq mi | Rich Township High School District 227 / 70,027 |
| 181. | 2,091.0/sq mi | Country Club Hills School District 160 / 12,495 |
| 182. | 2,065.8/sq mi | Pontiac-William Holliday School District 105 / 7,796 |
| 183. | 2,044.2/sq mi | Wood Dale School District 7 / 10,312 |
| 184. | 2,028.7/sq mi | Harlem Unit School District 122 / 44,262 |
| 185. | 2,018.5/sq mi | Wolf Branch School District 113 / 7,789 |
| 186. | 2,014.9/sq mi | Winfield School District 34 / 4,426 |
| 187. | 1,992.6/sq mi | Summit Hill School District 161 / 23,646 |
| 188. | 1,989.0/sq mi | Plainfield School District 202 / 122,136 |
| 189. | 1,970.7/sq mi | Grayslake Consolidated Community School District 46 / 29,536 |
| 190. | 1,948.9/sq mi | Richland School District 88A / 9,948 |
| 191. | 1,926.5/sq mi | LaGrange School District 105 / 12,573 |
| 192. | 1,921.2/sq mi | Medinah School District 11 / 7,119 |
| 193. | 1,905.7/sq mi | Avoca School District 37 / 6,435 |
| 194. | 1,893.3/sq mi | Cass School District 63 / 8,304 |
| 195. | 1,871.1/sq mi | Itasca School District 10 / 9,040 |
| 196. | 1,861.4/sq mi | Mokena School District 159 / 17,456 |
| 197. | 1,833.5/sq mi | East Moline School District 37 / 26,610 |
| 198. | 1,799.3/sq mi | Springfield School District 186 / 113,609 |
| 199. | 1,787.4/sq mi | Gower School District 62 / 9,602 |
| 200. | 1,747.3/sq mi | Steger School District 194 / 13,985 |
| 201. | 1,709.5/sq mi | Cary Community Consolidated School District 26 / 22,111 |
| 202. | 1,707.3/sq mi | Rosemont Elementary School District 78 / 2,309 |
| 203. | 1,692.1/sq mi | Grayslake Community High School District 127 / 44,701 |
| 204. | 1,689.3/sq mi | Woodland Community Consolidated School District 50 / 50,954 |
| 205. | 1,642.2/sq mi | Belle Valley School District 119 / 9,582 |
| 206. | 1,613.2/sq mi | Bloom Township High School District 206 / 64,695 |
| 207. | 1,596.6/sq mi | Chaney-Monge School District 88 / 7,237 |
| 208. | 1,575.8/sq mi | Lake Bluff Elementary School District 65 / 8,103 |
| 209. | 1,549.7/sq mi | Batavia Unit School District 101 / 31,774 |
| 210. | 1,537.9/sq mi | General George Patton School District 133 / 2,020 |
| 211. | 1,534.1/sq mi | Lake Zurich Community Unit School District 95 / 31,709 |
| 212. | 1,513.8/sq mi | Decatur School District 61 / 71,435 |
| 213. | 1,495.9/sq mi | Belleville School District 118 / 37,394 |
| 214. | 1,489.5/sq mi | Harmony Emge School District 175 / 10,158 |
| 215. | 1,486.4/sq mi | Pleasantdale School District 107 / 8,287 |
| 216. | 1,484.0/sq mi | Adlai E. Stevenson High School District 125 / 61,391 |
| 217. | 1,475.7/sq mi | Crystal Lake Community Consolidated School District 47 / 62,372 |
| 218. | 1,467.3/sq mi | Libertyville School District 70 / 18,534 |
| 219. | 1,463.6/sq mi | Moline Unit School District 40 / 48,280 |
| 220. | 1,451.7/sq mi | Lake Villa Community Consolidated School District 41 / 24,136 |
| 221. | 1,446.4/sq mi | Geneva Community Unit School District 304 / 29,781 |
| 222. | 1,433.4/sq mi | Peru Elementary School District 124 / 10,353 |
| 223. | 1,422.5/sq mi | Libertyville Community High School District 128 / 50,244 |
| 224. | 1,409.1/sq mi | LaSalle Elementary School District 122 / 8,895 |
| 225. | 1,407.2/sq mi | Community High School District 155 / 96,008 |
| 226. | 1,405.8/sq mi | Community Consolidated School District 168 / 10,352 |
| 227. | 1,400.8/sq mi | Rock Island School District 41 / 45,317 |
| 228. | 1,400.5/sq mi | Winthrop Harbor School District 1 / 6,682 |
| 229. | 1,379.2/sq mi | Troy Community Consolidated School District 30C / 36,092 |
| 230. | 1,362.5/sq mi | Sunset Ridge School District 29 / 4,110 |
| 231. | 1,339.4/sq mi | Gurnee School District 56 / 18,744 |
| 232. | 1,317.9/sq mi | Warren Township High School District 121 / 68,666 |
| 233. | 1,297.1/sq mi | New Lenox School District 122 / 38,889 |
| 234. | 1,296.5/sq mi | Community High School District 94 / 41,834 |
| 235. | 1,279.5/sq mi | Benjamin School District 25 / 6,555 |
| 236. | 1,279.2/sq mi | Big Hollow School District 38 / 15,095 |
| 237. | 1,279.1/sq mi | Bartonville School District 66 / 2,549 |
| 238. | 1,269.8/sq mi | Kildeer Countryside Community Consolidated School District 96 / 23,374 |
| 239. | 1,268.6/sq mi | Burnham School District 154-5 / 1,658 |
| 240. | 1,257.9/sq mi | Lake Forest Community High School District 115 / 27,017 |
| 241. | 1,243.1/sq mi | Peoria Heights Community Unit School District 325 / 6,914 |
| 242. | 1,241.0/sq mi | Gavin School District 37 / 7,729 |
| 243. | 1,239.8/sq mi | Brookwood School District 167 / 11,151 |
| 244. | 1,239.8/sq mi | Lockport Township High School District 205 / 76,156 |
| 245. | 1,236.8/sq mi | West Chicago School District 33 / 30,853 |
| 246. | 1,233.6/sq mi | Mundelein Consolidated High School District 120 / 44,244 |
| 247. | 1,232.3/sq mi | Rockford School District 205 / 191,430 |
| 248. | 1,223.1/sq mi | Palos Community Consolidated School District 118 / 23,432 |
| 249. | 1,223.0/sq mi | Paris-Union School District 95 / 8,469 |
| 250. | 1,217.8/sq mi | Grant Community High School District 124 / 36,397 |
| 251. | 1,206.8/sq mi | Zion-Benton Township High School District 126 / 44,560 |
| 252. | 1,188.4/sq mi | Champaign Community Unit School District 4 / 95,918 |
| 253. | 1,187.0/sq mi | Signal Hill School District 181 / 3,481 |
| 254. | 1,184.2/sq mi | Pekin Public School District108 / 34,388 |
| 255. | 1,176.9/sq mi | Lake Forest School District 67 / 18,592 |
| 256. | 1,169.7/sq mi | St. Charles Community Unit School District 303 / 68,412 |
| 257. | 1,169.0/sq mi | Homer Community Consolidated School District 33C / 29,870 |
| 258. | 1,164.2/sq mi | Joliet Township High School District 204 / 128,441 |
| 259. | 1,162.8/sq mi | Creve Coeur School District 76 / 6,406 |
| 260. | 1,146.7/sq mi | Elementary School District 159 / 19,971 |
| 261. | 1,140.2/sq mi | Urbana School District 116 / 50,963 |
| 262. | 1,137.7/sq mi | Mount Vernon School District 80 / 13,934 |
| 263. | 1,109.1/sq mi | Hillside School District 93 / 5,124 |
| 264. | 1,099.2/sq mi | Oswego Community Unit School District 308 / 77,693 |
| 265. | 1,098.6/sq mi | East St. Louis School District 189 / 37,689 |
| 266. | 1,089.5/sq mi | Lincolnshire-Prairieview School District 103 / 13,006 |
| 267. | 1,076.9/sq mi | Central Stickney School District 110 / 3,481 |
| 268. | 1,069.7/sq mi | Lincoln Way Community High School District 210 / 105,219 |
| 269. | 1,045.3/sq mi | South Beloit Community Unit School District 320 / 6,688 |
| 270. | 1,041.4/sq mi | Bourbonnais School District 53 / 23,144 |
| 271. | 1,039.1/sq mi | Sandridge School District 172 / 4,425 |
| 272. | 1,031.1/sq mi | Frankfort Community Consolidated School District 157C / 17,716 |
| 273. | 1,028.9/sq mi | Rockdale School District 84 / 2,240 |
| 274. | 1,023.1/sq mi | Lemont-Bromberek Combined School District 113A / 25,222 |
| 275. | 1,013.0/sq mi | Wauconda Community Unit School District 118 / 27,619 |
| 276. | 1,012.6/sq mi | Central School District 104 / 4,970 |
| 277. | 1,012.4/sq mi | East Alton-Wood River Community High School District 14 / 13,730 |
| 278. | 1,010.9/sq mi | Fox Lake Grade School District 114 / 8,628 |
| 279. | 1,008.1/sq mi | District 50 Schools / 7,496 |
| 280. | 993.3/sq mi | McHenry Community Consolidated School District 15 / 42,581 |
| 281. | 983.4/sq mi | McHenry Community High School District 156 / 45,604 |
| 282. | 969.9/sq mi | Robein School District 85 / 1,990 |
| 283. | 967.9/sq mi | United Township High School District 30 / 39,937 |
| 284. | 965.1/sq mi | Collinsville Community Unit School District 10 / 48,076 |
| 285. | 959.0/sq mi | Huntley Consolidated School District 158 / 43,647 |
| 286. | 947.7/sq mi | Fairmont School District 89 / 3,876 |
| 287. | 943.9/sq mi | Community Unit School District 300 / 111,782 |
| 288. | 928.5/sq mi | Cahokia Community Unit School District 187 / 18,889 |
| 289. | 915.7/sq mi | Pleasant Hill School District 69 / 1,831 |
| 290. | 915.0/sq mi | Bradley-Bourbonnais Consolidated High School District 307 / 39,974 |
| 291. | 910.7/sq mi | Belleville Township High School District 201 / 108,125 |
| 292. | 880.9/sq mi | Shiloh Village School District 85 / 4,953 |
| 293. | 878.8/sq mi | Community Consolidated School District 180 / 6,926 |
| 294. | 878.2/sq mi | Colona School District 190 / 3,660 |
| 295. | 869.0/sq mi | Emmons School District 33 / 3,616 |
| 296. | 860.9/sq mi | Ottawa Elementary School District 141 / 19,628 |
| 297. | 841.7/sq mi | Grant Community Consolidated School District 110 / 7,600 |
| 298. | 840.5/sq mi | Ford Heights School District 169 / 2,777 |
| 299. | 833.1/sq mi | Butler School District 53 / 4,839 |
| 300. | 825.9/sq mi | Lemont Township High School District 210 / 25,611 |
| 301. | 819.5/sq mi | O'Fallon Township High School District 203 / 40,469 |
| 302. | 817.0/sq mi | Oak Grove School District 68 / 7,189 |
| 303. | 813.4/sq mi | Danville Community Consolidated School District 118 / 38,933 |
| 304. | 806.8/sq mi | Will County School District 92 / 14,725 |
| 305. | 798.9/sq mi | Roxana Community Unit School District 1 / 12,372 |
| 306. | 793.2/sq mi | Beach Park Community Consolidated School District 3 / 20,446 |
| 307. | 788.9/sq mi | Oak Grove School District 68 / 3,692 |
| 308. | 777.8/sq mi | Monroe School District 70 / 3,195 |
| 309. | 775.6/sq mi | Bannockburn School District 106 / 2,177 |
| 310. | 771.7/sq mi | O'Fallon Community Consolidated School District 90 / 29,590 |
| 311. | 765.0/sq mi | Granite City Community Unit School District 9 / 43,198 |
| 312. | 762.5/sq mi | Antioch Community High School District 117 / 44,953 |
| 313. | 760.0/sq mi | East Peoria Community High School District 309 / 26,544 |
| 314. | 741.2/sq mi | Carbondale Elementary School District 95 / 27,528 |
| 315. | 738.3/sq mi | Norwood Elementary School District 63 / 3,616 |
| 316. | 737.7/sq mi | Bethalto Consolidated Unit School District 8 / 15,879 |
| 317. | 735.9/sq mi | Thornton School District 154 / 3,250 |
| 318. | 732.8/sq mi | Marseilles Elementary School District 150 / 4,120 |
| 319. | 732.2/sq mi | Kinnikinnick Community Consolidated School District 131 / 13,664 |
| 320. | 726.0/sq mi | Harrison School District 36 / 3,818 |
| 321. | 713.4/sq mi | Germantown Hills School District 69 / 6,329 |
| 322. | 691.2/sq mi | Pleasant Valley School District 62 / 4,868 |
| 323. | 690.7/sq mi | Kankakee School District 111 / 32,510 |
| 324. | 676.9/sq mi | East Peoria School District 86 / 18,966 |
| 325. | 664.7/sq mi | Antioch Community Consolidated School District 34 / 23,761 |
| 326. | 661.2/sq mi | Barrington Community Unit School District 220 / 45,392 |
| 327. | 653.0/sq mi | Johnsburg Community Unit School District 12 / 12,447 |
| 328. | 641.5/sq mi | Prairie Grove Community School District 46 / 7,259 |
| 329. | 631.6/sq mi | North Pekin-Marquette Heights School District 102 / 4,954 |
| 330. | 625.5/sq mi | Fremont School District 79 / 20,516 |
| 331. | 617.2/sq mi | Central School District 51 / 8,004 |
| 332. | 609.8/sq mi | South Pekin School District 137 / 1,830 |
| 333. | 602.0/sq mi | Wood River-Hartford Elementary School District 15 / 6,110 |
| 334. | 586.1/sq mi | Centralia School District 135 / 13,320 |
| 335. | 584.4/sq mi | Silvis School District 34 / 5,498 |
| 336. | 582.7/sq mi | Madison Community Unit School District 12 / 4,892 |
| 337. | 568.6/sq mi | Alton Community Unit School District 11 / 48,514 |
| 338. | 532.5/sq mi | Pekin Community High School District 303 / 45,857 |
| 339. | 528.6/sq mi | Riverton Community Unit School District 14 / 7,959 |
| 340. | 525.7/sq mi | Millburn Community Consolidated School District 24 / 8,008 |
| 341. | 521.6/sq mi | East Coloma School District 12 / 2,582 |
| 342. | 515.4/sq mi | Channahon School District 17 / 10,273 |
| 343. | 485.9/sq mi | Quincy School District 172 / 51,109 |
| 344. | 483.5/sq mi | Rantoul City School District 137 / 12,838 |
| 345. | 480.7/sq mi | McLean County Unit School District 5 / 97,056 |
| 346. | 480.5/sq mi | DeKalb Community Unit School District 428 / 52,506 |
| 347. | 463.8/sq mi | Grass Lake School District 36 / 2,565 |
| 348. | 460.1/sq mi | Brooklyn Community Unit School District 188 / 807 |
| 349. | 455.2/sq mi | Prairie Hill Community Consolidated School District 133 / 5,451 |
| 350. | 450.3/sq mi | Streator Elementary School District 44 / 16,545 |
| 351. | 447.1/sq mi | Limestone Community High School District 310 / 22,599 |
| 352. | 444.1/sq mi | Washington Community High School District 308 / 23,857 |
| 353. | 426.5/sq mi | Minooka Community High School District 111 / 38,611 |
| 354. | 426.4/sq mi | Crete-Monee Community Unit School District 201-U / 33,368 |
| 355. | 408.1/sq mi | Hampton School District 29 / 2,357 |
| 356. | 380.6/sq mi | Morton Community Unit School District 709 / 18,942 |
| 357. | 367.8/sq mi | Plano Community Unit School District 88 / 11,378 |
| 358. | 349.7/sq mi | Woodstock Community Unit School District 200 / 37,706 |
| 359. | 347.5/sq mi | Minooka Community Consolidated School District 201 / 24,332 |
| 360. | 346.4/sq mi | Yorkville Community Unit School District 115 / 30,038 |
| 361. | 344.3/sq mi | Venice Community Unit School District 3 / 688 |
| 362. | 333.7/sq mi | Herrin Community Unit School District 4 / 16,423 |
| 363. | 327.7/sq mi | Willow Springs School District 108 / 3,450 |
| 364. | 322.2/sq mi | Freeport School District 145 / 30,082 |
| 365. | 314.9/sq mi | Spring Valley Community Consolidated School District 99 / 6,000 |
| 366. | 313.5/sq mi | Dunlap Community Unit School District 323 / 21,236 |
| 367. | 298.3/sq mi | Manhattan School District 114 / 9,143 |
| 368. | 292.0/sq mi | Hononegah Community High School District 207 / 32,556 |
| 369. | 291.0/sq mi | Ball-Chatham Community Unit School District 5 / 27,509 |
| 370. | 289.4/sq mi | Edwardsville Community Unit School District 7 / 51,131 |
| 371. | 286.9/sq mi | Morris School District 54 / 11,448 |
| 372. | 286.1/sq mi | Belvidere Consolidated Unit School District 100 / 45,001 |
| 373. | 276.9/sq mi | Carbondale Community High School District 165 / 37,544 |
| 374. | 276.6/sq mi | Dupo Community Unit School District 196 / 7,209 |
| 375. | 276.1/sq mi | Galesburg Community Unit School District 205 / 34,850 |
| 376. | 275.3/sq mi | Union School District 81 / 1,631 |
| 377. | 269.2/sq mi | Sycamore Community Unit School District 427 / 22,208 |
| 378. | 267.4/sq mi | Rochelle Community Consolidated District 231 / 13,472 |
| 379. | 265.6/sq mi | Richmond-Burton Community High School District 157 / 11,648 |
| 379. | 265.6/sq mi | Nippersink School District 2 / 11,648 |
| 381. | 256.7/sq mi | Sandwich Community Unit School District 430 / 13,364 |
| 382. | 255.1/sq mi | Rondout School District 72 / 1,450 |
| 383. | 253.8/sq mi | Depue Community Unit School District 103 / 1,865 |
| 384. | 251.0/sq mi | Riverdale School District 14 / 1,101 |
| 385. | 248.8/sq mi | Washington School District 52 / 8,357 |
| 386. | 244.9/sq mi | Carbon Cliff-Barstow School District 36 / 1,812 |
| 387. | 242.6/sq mi | Columbia Community Unit School District 4 / 12,542 |
| 388. | 241.7/sq mi | Kewanee Community Unit School District 229 / 10,897 |
| 389. | 238.7/sq mi | Summersville School District 79 / 1,880 |
| 390. | 238.6/sq mi | Carterville Community Unit School District 5 / 11,927 |
| 391. | 235.1/sq mi | Rockton School District 140 / 11,945 |
| 392. | 234.9/sq mi | South Fork School District 14 / 2,601 |
| 393. | 229.0/sq mi | Central Community Unit School District 301 / 19,083 |
| 394. | 223.9/sq mi | St. George Community Consolidated School District 258 / 3,691 |
| 395. | 216.3/sq mi | Illinois Valley Central Unit School District 321 / 13,507 |
| 396. | 207.9/sq mi | Oglesby Elementary School District 125 / 4,771 |
| 397. | 207.9/sq mi | Bethel School District 82 / 1,072 |
| 398. | 207.1/sq mi | Coal City Community Unit School District 1 / 11,131 |
| 399. | 206.6/sq mi | Frankfort Community Unit School District 168 / 11,868 |
| 400. | 203.5/sq mi | Dalzell School District 98 / 740 |
| 401. | 200.9/sq mi | Benton Community Consolidated School District 47 / 10,031 |
| 402. | 197.7/sq mi | Willow Grove School District 46 / 2,239 |
| 403. | 197.5/sq mi | Westville Community Unit School District 2 / 6,818 |
| 404. | 194.2/sq mi | Mount Zion Community Unit School District 3 / 12,245 |
| 405. | 187.9/sq mi | Dixon Unit School District 170 / 22,133 |
| 406. | 185.1/sq mi | Smithton Community Consolidated School District 130 / 4,559 |
| 407. | 182.3/sq mi | Kaneland Community Unit School District 302 / 25,778 |
| 408. | 182.0/sq mi | Sterling Community Unit District 5 / 21,850 |
| 409. | 176.7/sq mi | Rock Falls Township High School District 301 / 14,656 |
| 410. | 173.8/sq mi | Triad Community Unit School District 2 / 21,195 |
| 411. | 172.7/sq mi | Reed Custer Community Unit School District 255U / 9,343 |
| 412. | 170.5/sq mi | Mascoutah Community Unit School District 19 / 17,996 |
| 413. | 169.6/sq mi | Marion Community Unit School District 2 / 27,844 |
| 414. | 166.9/sq mi | Braceville School District 75 / 1,399 |
| 415. | 165.7/sq mi | Albers School District 63 / 1,409 |
| 416. | 165.0/sq mi | Morris Community High School District 101 / 18,171 |
| 417. | 164.4/sq mi | Rochester Community Unit School District 3A / 10,780 |
| 418. | 164.3/sq mi | North Wamac School District 186 / 990 |
| 419. | 163.7/sq mi | Mahomet-Seymour Community Unit School District 3 / 14,271 |
| 420. | 161.4/sq mi | Effingham Community Unit School District 40 / 20,319 |
| 421. | 159.2/sq mi | East Dubuque Community Unit School District 119 / 4,393 |
| 422. | 157.9/sq mi | Centralia High School District 200 / 21,153 |
| 423. | 157.7/sq mi | LaSalle-Peru Township High School District 120 / 28,956 |
| 424. | 154.4/sq mi | Central City School District 133 / 2,019 |
| 425. | 154.0/sq mi | Metamora Township High School District 122 / 16,360 |
| 426. | 152.2/sq mi | Millstadt Consolidated Community School District 160 / 8,650 |
| 427. | 151.5/sq mi | Salem School District 111 / 8,695 |
| 428. | 151.2/sq mi | Marengo-Union Elementary Consolidated District 165 / 10,050 |
| 429. | 150.9/sq mi | Streator Township High School District 40 / 18,378 |
| 430. | 149.8/sq mi | Riverview Consolidated Community School District 2 / 2,986 |
| 431. | 148.5/sq mi | Macomb Community Unit School District 185 / 22,464 |
| 432. | 147.7/sq mi | Unity Point Community Consolidated School District 140 / 5,438 |
| 433. | 144.1/sq mi | Mattoon Community Unit School District 2 / 23,177 |
| 434. | 142.0/sq mi | Wesclin Community Unit School District 3 / 7,971 |
| 435. | 142.0/sq mi | Pontiac Community Consolidated School District 429 / 13,646 |
| 436. | 140.0/sq mi | Laraway Community Consolidated School District 70C / 3,161 |
| 437. | 139.7/sq mi | Aviston School District 21 / 2,837 |
| 438. | 136.7/sq mi | Byron Community Unit School District 226 / 7,955 |
| 439. | 136.0/sq mi | Saratoga Community Consolidated School District 60C / 6,049 |
| 440. | 136.0/sq mi | Christopher Community Unit School District 99 / 5,139 |
| 441. | 134.4/sq mi | Genoa-Kingston Community Unit School District 424 / 9,139 |
| 442. | 134.0/sq mi | Manteno Community Unit School District 5 / 12,114 |
| 443. | 130.8/sq mi | Ottawa Township High School District 140 / 31,237 |
| 444. | 129.8/sq mi | Elwood Community Consolidated School District 203 / 3,787 |
| 445. | 128.4/sq mi | St. Joseph Community Consolidated School District 169 / 6,142 |
| 446. | 127.3/sq mi | Jacksonville School District 117 / 28,184 |
| 447. | 127.0/sq mi | Harvard Community Unit School District 50 / 13,486 |
| 448. | 125.0/sq mi | Hall High School District 502 / 9,128 |
| 449. | 124.6/sq mi | Canton Union School District 66 / 17,530 |
| 450. | 123.7/sq mi | Anna Community Consolidated School District 37 / 6,410 |
| 451. | 123.0/sq mi | Beecher Community Unit School District 200U / 6,985 |
| 452. | 122.7/sq mi | Charleston Community Unit School District 1 / 28,395 |
| 453. | 120.2/sq mi | Limestone Walters Community Consolidated School District 316 / 2,067 |
| 454. | 120.1/sq mi | Somonauk Community Unit School District 432 / 5,089 |
| 455. | 119.7/sq mi | Marengo Community High School District 154 / 13,691 |
| 456. | 117.3/sq mi | Rantoul Township High School District 193 / 17,660 |
| 457. | 116.1/sq mi | Lebanon Community Unit School District 9 / 5,305 |
| 458. | 115.4/sq mi | Mount Vernon Township High School District 201 / 29,843 |
| 459. | 112.1/sq mi | Williamsville Community Unit School District 15 / 7,871 |
| 460. | 111.9/sq mi | Freeburg Community High School District 77 / 13,146 |
| 461. | 109.7/sq mi | Staunton Community Unit School District 6 / 8,400 |
| 462. | 109.4/sq mi | Ina Community Consolidated School District 8 / 3,060 |
| 463. | 105.2/sq mi | Freeburg Community Consolidated School District 70 / 7,714 |
| 464. | 104.3/sq mi | Rankin Community School District 98 / 3,228 |
| 465. | 101.6/sq mi | Highland Community Unit School District 5 / 18,392 |
| 466. | 100.1/sq mi | Wethersfield Community Unit School District 230 / 3,974 |
| 467. | 98.6/sq mi | Murphysboro Community Unit School District 186 / 15,544 |
| 468. | 97.4/sq mi | Waterloo Community Unit School District 5 / 17,772 |
| 469. | 96.1/sq mi | Breese School District 12 / 7,258 |
| 470. | 95.6/sq mi | Wilmington Community Unit School District 209U / 9,488 |
| 471. | 95.5/sq mi | Illini Bluffs Community Unit School District 327 / 6,133 |
| 472. | 94.1/sq mi | Fairfield Public School District 112 / 6,126 |
| 473. | 93.6/sq mi | Auburn Community Unit School District 10 / 6,990 |
| 474. | 91.3/sq mi | Robinson Community Unit School District 2 / 11,988 |
| 475. | 91.0/sq mi | Metamora Community Consolidated School District 1 / 7,045 |
| 476. | 90.6/sq mi | Hollis Consolidated School District 328 / 781 |
| 477. | 89.8/sq mi | Du Quoin Community Unit School District 300 / 9,591 |
| 478. | 89.7/sq mi | Harrisburg Community Unit School District 3 / 12,763 |
| 479. | 88.7/sq mi | Arthur Community Unit School District 305 / 7,681 |
| 480. | 88.6/sq mi | Lincoln Community High School District 404 / 23,979 |
| 481. | 88.5/sq mi | Johnston City Community Unit School District 1 / 7,321 |
| 482. | 87.1/sq mi | Winnebago Community Unit School District 323 / 8,216 |
| 483. | 86.9/sq mi | Eureka Community Unit District 140 / 9,835 |
| 484. | 86.5/sq mi | River Bend Community Unit District 2 / 6,722 |
| 485. | 86.3/sq mi | Ladd Community Consolidated School District 94 / 1,817 |
| 486. | 86.0/sq mi | Momence Community Unit School District 1 / 7,218 |
| 487. | 85.2/sq mi | Gillespie Community Unit School District 7 / 7,873 |
| 488. | 83.9/sq mi | Iroquois County Community Unit School District 9 / 7,118 |
| 489. | 81.9/sq mi | Odin Community High School District 700 / 1,680 |
| 490. | 81.8/sq mi | Central Community High School District 71 / 16,730 |
| 491. | 81.6/sq mi | Litchfield Community Unit School District 12 / 8,873 |
| 492. | 79.9/sq mi | Chester Community Unit School District 139 / 11,183 |
| 493. | 79.6/sq mi | Odin School District 122 / 1,702 |
| 494. | 79.2/sq mi | De Soto Consolidated School District 86 / 1,900 |
| 495. | 78.4/sq mi | North Boone Community Unit School District 200 / 8,564 |
| 496. | 78.0/sq mi | Rochelle Township High School District 212 / 16,991 |
| 497. | 77.6/sq mi | Maroa-Forsyth Community Unit School District 2 / 6,417 |
| 498. | 77.3/sq mi | Deer Creek-Mackinaw Community Unit School District 701 / 5,807 |
| 499. | 76.8/sq mi | Zeigler-Royalton Community Unit School District 188 / 4,186 |
| 500. | 76.5/sq mi | Catlin Community Unit School District 5 / 3,113 |
| 501. | 76.4/sq mi | Beardstown Community Unit School District 15 / 7,941 |
| 502. | 75.9/sq mi | Riley Community Consolidated School District 18 / 3,641 |
| 503. | 75.5/sq mi | Gardner-South Wilmington Township High School District / 4,037 |
| 504. | 74.8/sq mi | Monmouth-Roseville Community Unit School District 238 / 11,641 |
| 505. | 73.8/sq mi | Sesser-Valier Community Unit School District 196 / 4,212 |
| 506. | 73.7/sq mi | Peotone Community Unit School District 207U / 10,749 |
| 507. | 72.8/sq mi | Tremont Community Unit School District 702 / 5,070 |
| 508. | 72.0/sq mi | Massac Unit School District 1 / 13,609 |
| 509. | 71.9/sq mi | South Wilmington Consolidated School District 74 / 975 |
| 510. | 71.2/sq mi | West Lincoln-Broadwell Elementary School District 92 / 4,963 |
| 511. | 71.2/sq mi | Giant City Community Consolidated School District 130 / 2,678 |
| 512. | 71.0/sq mi | Coulterville Unit School District 1 / 1,711 |
| 513. | 70.9/sq mi | Oregon Community Unit School District 220 / 10,684 |
| 514. | 70.9/sq mi | Bunker Hill Community Unit School District 8 / 4,468 |
| 515. | 70.7/sq mi | Eldorado Community Unit School District 4 / 7,286 |
| 516. | 70.6/sq mi | Riverdale Community Unit School District 100 / 6,402 |
| 517. | 70.6/sq mi | Pleasant Plains Community Unit School District 8 / 8,049 |
| 518. | 69.9/sq mi | Virden Community Unit School District 4 / 5,096 |
| 519. | 69.9/sq mi | Meridian Community Unit School District 223 / 8,741 |
| 520. | 69.7/sq mi | Oakwood Community Unit School District 76 / 6,158 |
| 521. | 68.5/sq mi | Taylorville Community Unit School District 3 / 18,760 |
| 522. | 68.4/sq mi | St. Joseph-Ogden Community High School District 305 / 8,276 |
| 523. | 68.3/sq mi | Anna Jonesboro Community High School District 81 / 10,764 |
| 524. | 67.5/sq mi | Georgetown-Ridge Farm Consolidated Unit School District 4 / 6,788 |
| 525. | 67.4/sq mi | Pecatonica Community Unit School District 321 / 5,092 |
| 526. | 66.0/sq mi | Benton Consolidated High School District 103 / 12,420 |
| 527. | 65.8/sq mi | Selmaville Community Consolidated School District 10 / 1,960 |
| 528. | 65.8/sq mi | Warrensburg-Latham Community Unit District 11 / 6,160 |
| 529. | 64.7/sq mi | Galena Unit School District 120 / 5,928 |
| 530. | 64.0/sq mi | Goreville Community Unit School District 1 / 3,882 |
| 531. | 63.7/sq mi | Jonesboro Community Consolidated School District 43 / 2,834 |
| 532. | 63.5/sq mi | Bluford Community Consolidated School District 114 / 2,556 |
| 533. | 62.7/sq mi | Hillsboro Community Unit School District 3 / 14,713 |
| 534. | 62.6/sq mi | Thomasboro Community Consolidated School District 130 / 2,115 |
| 535. | 62.0/sq mi | Geneseo Community Unit School District 228 / 15,989 |
| 536. | 60.1/sq mi | Germantown School District 60 / 1,714 |
| 537. | 60.0/sq mi | Jersey Community Unit School District 100 / 20,185 |
| 538. | 59.9/sq mi | Princeton Elementary School District 115 / 11,523 |
| 539. | 59.9/sq mi | Mount Olive Community Unit School District 5 / 3,362 |
| 540. | 59.9/sq mi | Pontiac Township High School District 90 / 16,267 |
| 541. | 59.5/sq mi | Athens Community Unit School District 213 / 5,000 |
| 542. | 59.3/sq mi | Newark Community Consolidated School District 66 / 2,809 |
| 543. | 58.8/sq mi | Tuscola Community Unit School District 301 / 5,759 |
| 544. | 58.3/sq mi | Salem Community High School District 600 / 15,043 |
| 545. | 58.3/sq mi | Rome Community Consolidated School District 2 / 2,519 |
| 546. | 57.6/sq mi | Seneca Community Consolidated School District 170 / 3,778 |
| 547. | 57.5/sq mi | Bond County Community Unit School District 2 / 13,391 |
| 548. | 57.4/sq mi | Wabash Community Unit School District 348 / 10,610 |
| 549. | 57.2/sq mi | Marissa Community Unit School District 40 / 3,476 |
| 550. | 56.4/sq mi | Shelbyville Community Unit School District 4 / 7,911 |
| 551. | 56.3/sq mi | Monticello Community Unit School District 25 / 8,965 |
| 552. | 56.3/sq mi | Morrison Community Unit School District 6 / 6,664 |
| 553. | 56.1/sq mi | Sherrard Community Unit School District 200 / 9,755 |
| 554. | 55.5/sq mi | Sullivan Community Unit School District 300 / 7,387 |
| 555. | 55.5/sq mi | Mendota Community Consolidated School District 289 / 11,018 |
| 556. | 55.5/sq mi | Wallace Community Consolidated School District 195 / 2,713 |
| 557. | 54.8/sq mi | Tolono Community Unit School District 7 / 9,537 |
| 558. | 54.7/sq mi | East Richland Community Unit School District 1 / 14,132 |
| 559. | 54.6/sq mi | Steeleville Community Unit School District 138 / 3,126 |
| 560. | 54.6/sq mi | Bartelso School District 57 / 1,292 |
| 561. | 54.6/sq mi | Mendota Township High School District 280 / 11,061 |
| 562. | 54.3/sq mi | Princeton High School District 500 / 12,376 |
| 563. | 54.2/sq mi | Community Unit School District 16 / 6,213 |
| 564. | 53.9/sq mi | Dodds Community Consolidated School District 7 / 1,374 |
| 565. | 53.8/sq mi | Raccoon Consolidated School District 1 / 2,489 |
| 566. | 53.1/sq mi | Field Community Consolidated School District 3 / 2,768 |
| 567. | 52.9/sq mi | Orion Community Unit School District 223 / 6,078 |
| 568. | 52.7/sq mi | Clinton Community Unit School District 15 / 12,177 |
| 569. | 52.6/sq mi | Hinckley-Big Rock Community Unit School District 429 / 4,715 |
| 570. | 52.6/sq mi | Elmwood Community Unit School District 322 / 3,872 |
| 571. | 52.6/sq mi | Carrier Mills-Stonefort Community Unit School District / 2,962 |
| 572. | 52.1/sq mi | Teutopolis Community Unit School District 50 / 5,323 |
| 573. | 52.1/sq mi | Bismarck-Henning Consolidated Unit School District / 5,065 |
| 574. | 51.9/sq mi | Dwight Common School District 232 / 6,628 |
| 575. | 51.8/sq mi | Gardner Community Consolidated School District 72C / 1,663 |
| 576. | 51.7/sq mi | Southwestern Community Unit School District 9 / 8,981 |
| 577. | 51.4/sq mi | Brimfield Community Unit School District 309 / 3,862 |
| 578. | 50.9/sq mi | Alden-Hebron School District 19 / 2,572 |
| 579. | 50.7/sq mi | St. Libory Consolidated School District 30 / 869 |
| 580. | 50.4/sq mi | Sandoval Community Unit School District 501 / 2,560 |
| 581. | 49.8/sq mi | Shirland Community Consolidated School District 134 / 1,496 |
| 582. | 49.7/sq mi | Girard Community Unit School District 3 / 3,823 |
| 583. | 49.7/sq mi | Community Unit School District 2 / 6,076 |
| 584. | 49.4/sq mi | Abingdon Community Unit School District 217 / 4,360 |
| 585. | 49.3/sq mi | Durand Community Unit School District 322 / 3,672 |
| 586. | 49.0/sq mi | Tri-Valley Community Unit School District 3 / 4,882 |
| 587. | 48.7/sq mi | Pawnee Community Unit School District 11 / 3,304 |
| 588. | 48.6/sq mi | Dakota Community Unit School District 201 / 4,909 |
| 589. | 48.5/sq mi | Vienna School District 55 / 4,547 |
| 590. | 48.4/sq mi | Heyworth Community Unit School District 4 / 4,831 |
| 591. | 48.3/sq mi | Miller Township Community Consolidated School District / 2,327 |
| 592. | 48.2/sq mi | Grant Park Community Unit School District 6 / 3,320 |
| 593. | 47.9/sq mi | Meridian Community Unit School District 15 / 6,569 |
| 594. | 47.5/sq mi | Tamaroa School District 5 / 719 |
| 595. | 47.5/sq mi | Montmorency Community Consolidated School District 145 / 2,745 |
| 596. | 47.3/sq mi | Cherry School District 92 / 564 |
| 597. | 47.1/sq mi | Vandalia Community Unit School District 203 / 11,080 |
| 598. | 47.1/sq mi | Hamilton Community Consolidated School District 328 / 3,870 |
| 599. | 47.0/sq mi | McClellan Community Consolidated School District 12 / 860 |
| 600. | 46.8/sq mi | Damiansville School District 62 / 756 |
| 601. | 46.7/sq mi | Jasper Community Consolidated School District 17 / 1,457 |
| 602. | 46.6/sq mi | Knoxville Community Unit School District 202 / 6,260 |
| 603. | 46.5/sq mi | Waltham Community Consolidated School District 185 / 2,429 |
| 604. | 46.4/sq mi | Red Bud Community Unit School District 132 / 7,965 |
| 605. | 46.3/sq mi | Thompsonville Community Unit School District 174 / 2,161 |
| 606. | 46.3/sq mi | Neoga Community Unit School District 3 / 5,140 |
| 607. | 46.3/sq mi | Le Roy Community Unit School District 2 / 4,619 |
| 608. | 46.1/sq mi | Flora Community Unit School District 35 / 8,030 |
| 609. | 45.8/sq mi | St. Rose School District 14-15 / 1,464 |
| 610. | 45.4/sq mi | Fairfield Community High School District 225 / 10,034 |
| 611. | 45.1/sq mi | Earlville Community Unit School District 9 / 2,717 |
| 612. | 44.7/sq mi | Cobden School Unit District 17 / 3,899 |
| 613. | 44.7/sq mi | Argenta-Oreana Community Unit School District 1 / 3,854 |
| 614. | 44.5/sq mi | Spring Lake Community Consolidated School District 606 / 639 |
| 615. | 44.4/sq mi | Villa Grove Community Unit School District 302 / 3,973 |
| 616. | 44.3/sq mi | Red Hill Community Unit School District 10 / 9,035 |
| 617. | 44.2/sq mi | Sparta Community Unit School District 140 / 8,407 |
| 618. | 43.8/sq mi | Pembroke Consolidated Community School District 259 / 1,971 |
| 619. | 43.7/sq mi | Cairo Community Unit School District 1 / 2,950 |
| 620. | 43.1/sq mi | Herscher Community Unit School District 2 / 10,651 |
| 621. | 43.1/sq mi | Dwight Township High School District 230 / 6,859 |
| 622. | 42.7/sq mi | Carlyle Community Unit School District 1 / 9,775 |
| 623. | 41.9/sq mi | Farmington Central Community Unit School District 265 / 7,945 |
| 624. | 41.6/sq mi | New Athens Community Unit School District 60 / 3,561 |
| 625. | 41.6/sq mi | Lawrence County Community Unit District 20 / 7,744 |
| 626. | 41.4/sq mi | Porta Community Unit School District 202 / 7,234 |
| 627. | 41.3/sq mi | Lena-Winslow Community Unit School District 202 / 4,906 |
| 628. | 41.1/sq mi | El Paso-Gridley Community Unit School District 11 / 7,195 |
| 629. | 40.9/sq mi | Altamont Community Unit School District 10 / 4,959 |
| 630. | 40.9/sq mi | Chester-East Lincoln Community Csd 61 / 5,048 |
| 631. | 40.8/sq mi | Irvington County Community Unit School District 11 / 833 |
| 632. | 40.7/sq mi | Hiawatha Community Unit School District 426 / 3,168 |
| 633. | 40.6/sq mi | Pana Community Unit School District 8 / 8,935 |
| 634. | 40.6/sq mi | Hoopeston Area Community Unit School District 11 / 7,178 |
| 635. | 40.5/sq mi | Carlinville Community Unit School District 1 / 9,633 |
| 636. | 40.3/sq mi | Community Consolidated School District 204 / 3,614 |
| 637. | 40.0/sq mi | Delavan Community Unit School District 703 / 2,593 |
| 638. | 39.4/sq mi | Woodlawn Community Consolidated School District 4 / 2,771 |
| 639. | 39.2/sq mi | Arcola Consolidated Unit School District 306 / 4,441 |
| 640. | 38.9/sq mi | Roanoke-Benson Community Unit School District 60 / 3,332 |
| 641. | 38.9/sq mi | Newark Community High School District 18 / 3,879 |
| 642. | 38.8/sq mi | Rockridge Community Unit School District 300 / 7,224 |
| 643. | 38.7/sq mi | Putnam County Community Unit School District 535 / 5,514 |
| 644. | 38.4/sq mi | St. Anne Community High School District 302 / 5,161 |
| 645. | 38.0/sq mi | West Carroll Community Unit School District 314 / 8,557 |
| 646. | 37.8/sq mi | Dallas Elementary School District 327 / 2,006 |
| 647. | 37.7/sq mi | Marshall Community Unit School District 2C / 8,115 |
| 648. | 37.2/sq mi | Central Community Unit School District 4 / 6,653 |
| 649. | 37.1/sq mi | Crab Orchard Community Unit School District 3 / 2,632 |
| 650. | 37.1/sq mi | Pinckneyville Community High School District 101 / 10,799 |
| 651. | 37.0/sq mi | Meridian Community Unit School District 101 / 3,649 |
| 652. | 36.9/sq mi | Sangamon Valley Community Unit School District 9 / 4,136 |
| 653. | 36.8/sq mi | Grayville Community Unit School District 1 / 1,960 |
| 654. | 35.7/sq mi | St. Anne Consolidated Community School District 256 / 3,190 |
| 655. | 35.7/sq mi | Nashville Consolidated Community School District 49 / 5,710 |
| 656. | 35.0/sq mi | Fisher Community Unit School District 1 / 3,622 |
| 657. | 35.0/sq mi | Warren Community Unit School District 205 / 2,969 |
| 658. | 34.6/sq mi | Princeville Community Unit School District 326 / 4,206 |
| 659. | 34.5/sq mi | Cumberland Community Unit School District 77 / 6,411 |
| 660. | 34.4/sq mi | Pinckneyville School District 50 / 6,531 |
| 661. | 34.4/sq mi | Webber Township High School District 204 / 2,946 |
| 662. | 34.3/sq mi | Dongola School Unit District 66 / 2,027 |
| 663. | 34.2/sq mi | North Greene Unit School District 3 / 6,089 |
| 664. | 34.1/sq mi | Orangeville Community Unit School District 203 / 2,851 |
| 665. | 33.9/sq mi | Geff Community Consolidated School District 14 / 939 |
| 666. | 33.8/sq mi | Creston Community Consolidated School District 161 / 1,110 |
| 667. | 33.8/sq mi | Lexington Community Unit School District 7 / 3,063 |
| 668. | 33.8/sq mi | Polo Community Unit School District 222 / 3,918 |
| 669. | 33.1/sq mi | Seneca Township High School District 160 / 7,356 |
| 670. | 32.9/sq mi | Paxton-Buckley-Loda Community Unit School District 10 / 8,485 |
| 671. | 32.6/sq mi | Cambridge Community Unit School District 227 / 2,861 |
| 672. | 32.4/sq mi | Woodland Community Unit School District 5 / 2,753 |
| 673. | 32.1/sq mi | Midland Community Unit School District 7 / 5,510 |
| 674. | 32.1/sq mi | Pearl City Community Unit School District 200 / 2,907 |
| 675. | 32.1/sq mi | Tri-City Community Unit School District 1 / 3,191 |
| 676. | 32.1/sq mi | Woodlawn Community High School District 205 / 3,230 |
| 677. | 31.9/sq mi | Payson Community Unit School District 1 / 3,956 |
| 678. | 31.9/sq mi | Leland Community Unit School District 1 / 1,738 |
| 679. | 31.7/sq mi | Bushnell-Prairie City Community Unit School District 170 / 4,230 |
| 680. | 31.7/sq mi | Ludlow Community Consolidated School District 142 / 1,129 |
| 681. | 31.3/sq mi | Midwest Central Community Unit School District 191 / 6,175 |
| 682. | 30.9/sq mi | Galva Community Unit School District 224 / 3,413 |
| 683. | 30.7/sq mi | Carmi-White County Community Unit School District 5 / 9,150 |
| 684. | 30.7/sq mi | Olympia Community Unit School District 16 / 11,585 |
| 685. | 30.7/sq mi | Alwood Community Unit School District 225 / 2,643 |
| 686. | 30.6/sq mi | Vienna High School District 133 / 8,921 |
| 687. | 30.6/sq mi | Egyptian Community Unit School District 5 / 3,709 |
| 688. | 30.6/sq mi | Rutland Community Consolidated School District 230 / 785 |
| 689. | 30.1/sq mi | Forrestville Valley Community Unit School District 221 / 5,366 |
| 690. | 30.0/sq mi | Prairie Central Community Unit School District 8 / 11,089 |
| 691. | 30.0/sq mi | Fulton County Community Unit School District 3 / 3,605 |
| 692. | 29.8/sq mi | Joppa-Maple Grove Unit District 38 / 1,492 |
| 693. | 29.7/sq mi | Casey-Westfield Community Unit School District 4C / 5,922 |
| 694. | 29.4/sq mi | Henry-Senachwine Consolidated Unit School District 5 / 3,383 |
| 695. | 29.2/sq mi | St. Elmo Community Unit School District 202 / 2,784 |
| 696. | 29.1/sq mi | Prophetstown-Lyndon-Tampico Community Unit School District 3 / 5,585 |
| 697. | 29.1/sq mi | Havana Community Unit School District 126 / 6,545 |
| 698. | 29.0/sq mi | Windsor Community Unit School District 1 / 2,889 |
| 699. | 28.8/sq mi | Lewistown Community Unit School District 97 / 4,892 |
| 700. | 28.7/sq mi | Cerro Gordo Community Unit School District 100 / 2,903 |
| 701. | 28.6/sq mi | Fieldcrest Community Unit School District 6 / 6,842 |
| 702. | 28.1/sq mi | Palestine Community Unit School District 3 / 2,464 |
| 703. | 27.9/sq mi | Nelson Public School District 8 / 358 |
| 704. | 27.8/sq mi | Eastland Community Unit School District 308 / 4,291 |
| 705. | 27.8/sq mi | Elverado Community Unit School District 196 / 2,981 |
| 706. | 27.8/sq mi | Allendale Community Consolidated School District 17 / 1,120 |
| 707. | 27.5/sq mi | Nashville Community High School District 99 / 8,905 |
| 708. | 27.3/sq mi | Bement Community Unit School District 5 / 2,521 |
| 709. | 27.3/sq mi | Beecher City Community Unit School District 20 / 2,571 |
| 710. | 27.0/sq mi | Opdyke-Belle Rive Community Consolidated School District 5 / 2,033 |
| 711. | 26.9/sq mi | Central A & M Community Unit School District 21 / 4,955 |
| 712. | 26.8/sq mi | Dimmick Community Consolidated School District 175 / 1,173 |
| 713. | 26.6/sq mi | New Simpson Hill Consolidated District 32 / 2,765 |
| 714. | 26.5/sq mi | Gibson City-Melvin-Sibley Community Unit School District 5 / 5,896 |
| 715. | 26.3/sq mi | Rossville-Alvin Community Unit School District 7 / 2,546 |
| 716. | 26.3/sq mi | Lee Center Community Unit School District 271 / 1,617 |
| 717. | 26.2/sq mi | Prairie du Rocher Community Consolidated School District 134 / 973 |
| 717. | 26.2/sq mi | Chester Non-High School District 122 / 973 |
| 719. | 26.0/sq mi | Edinburg Community Unit School District 4 / 1,949 |
| 720. | 26.0/sq mi | Iroquois West Community Unit School District 10 / 4,773 |
| 721. | 25.8/sq mi | Pikeland Community Unit School District 10 / 8,684 |
| 722. | 25.8/sq mi | Edwards County Community Unit School District 1 / 5,879 |
| 723. | 25.8/sq mi | Grand Ridge Community Consolidated School District 95 / 2,792 |
| 724. | 25.8/sq mi | Mazon-Verona-Kinsman Elementary School District 2C / 2,799 |
| 725. | 25.6/sq mi | Ashton Community Unit School District 275 / 3,787 |
| 726. | 25.6/sq mi | Galatia Community Unit School District 1 / 2,183 |
| 727. | 25.6/sq mi | Gifford Community Consolidated School District 188 / 1,795 |
| 728. | 25.5/sq mi | Trico Community Unit School District 176 / 6,317 |
| 729. | 25.3/sq mi | Atwood-Hammond Community Unit School District 39 / 2,444 |
| 730. | 25.0/sq mi | Lovington Community Unit School District 303 / 1,843 |
| 731. | 25.0/sq mi | Williamsfield Community Unit School District 210 / 1,910 |
| 732. | 24.8/sq mi | Lick Creek Community Consolidated School District 16 / 1,520 |
| 733. | 24.7/sq mi | Amboy Community Unit School District 272 / 5,036 |
| 734. | 24.6/sq mi | Indian Creek Community Unit District 425 / 4,384 |
| 735. | 24.4/sq mi | Nauvoo-Colusa Community Unit School District 325 / 2,441 |
| 736. | 24.2/sq mi | Nokomis Community Unit School District 22 / 3,925 |
| 737. | 24.2/sq mi | Prairieview-Ogden Community Consolidated School District 197 / 2,416 |
| 738. | 24.2/sq mi | Tonica Community Consolidated School District 79 / 1,393 |
| 739. | 24.1/sq mi | Malden Community Consolidated School District 84 / 869 |
| 740. | 24.0/sq mi | Blue Ridge Community Unit School District 18 / 5,126 |
| 741. | 23.6/sq mi | Lowpoint-Washburn Community Unit School District 21 / 2,511 |
| 742. | 23.5/sq mi | Dieterich Community Unit School District 30 / 2,499 |
| 743. | 23.5/sq mi | Cowden-Herrick Community Unit School District 3A / 2,582 |
| 744. | 23.3/sq mi | Carthage Elementary School District 317 / 4,157 |
| 745. | 23.3/sq mi | Stockton Community Unit School District 206 / 3,877 |
| 746. | 23.3/sq mi | Astoria Community Unit School District 1 / 2,118 |
| 747. | 23.2/sq mi | South Central Community Unit School District 401 / 5,051 |
| 748. | 23.1/sq mi | Kings Consolidated School District 144 / 949 |
| 749. | 22.9/sq mi | Hardin County Community Unit School District 1 / 4,226 |
| 750. | 22.7/sq mi | Scales Mound Community Unit School District 211 / 1,624 |
| 751. | 22.6/sq mi | Illini West High School District 307 / 8,403 |
| 752. | 22.5/sq mi | Mulberry Grove Community Unit School District 1 / 2,499 |
| 753. | 22.5/sq mi | Grand Prairie Community Consolidated School District 6 / 806 |
| 754. | 22.4/sq mi | Brown County Community Unit School District 1 / 6,872 |
| 755. | 22.4/sq mi | Mercer County School District 404 / 8,463 |
| 756. | 22.3/sq mi | Norris City-Omaha-Enfield Community Unit School District 3 / 4,586 |
| 757. | 22.2/sq mi | Ashley Community Consolidated School District 15 / 1,836 |
| 758. | 22.2/sq mi | Heritage Community Unit School District 8 / 2,978 |
| 759. | 22.1/sq mi | Oblong Community Unit School District 4 / 3,764 |
| 760. | 22.1/sq mi | Flanagan-Cornell District 74 / 1,727 |
| 761. | 22.1/sq mi | Carrollton Community Unit School District 1 / 4,147 |
| 762. | 22.0/sq mi | Winchester Community Unit School District 1 / 3,769 |
| 763. | 22.0/sq mi | Kell Consolidated School District 2 / 993 |
| 764. | 22.0/sq mi | West Washington County Community Unit District 10 / 4,012 |
| 765. | 21.9/sq mi | Chadwick-Milledgeville Community Unit School District 399 / 2,956 |
| 766. | 21.5/sq mi | Calhoun Community Unit School District 40 / 3,447 |
| 767. | 21.4/sq mi | Hamilton County Community Unit School District 10 / 7,794 |
| 768. | 21.4/sq mi | Century Community Unit School District 100 / 2,442 |
| 769. | 21.2/sq mi | Lisbon Community Consolidated School District 90 / 925 |
| 770. | 21.2/sq mi | Okaw Valley Community Unit School District 302 / 3,423 |
| 771. | 21.2/sq mi | Bureau Valley Community Unit School District 340 / 7,195 |
| 772. | 21.2/sq mi | Potomac Community Unit School District 10 / 1,179 |
| 773. | 21.2/sq mi | Brownstown Community Unit School District 201 / 1,961 |
| 774. | 21.1/sq mi | Stewardson-Strasburg Community Unit District 5A / 2,404 |
| 775. | 21.0/sq mi | Buncombe Consolidated School District 43 / 721 |
| 776. | 21.0/sq mi | Erie Community Unit School District 1 / 3,347 |
| 777. | 20.9/sq mi | Camp Point Community Unit School District 3 / 4,876 |
| 778. | 20.9/sq mi | ROWVA Community Unit School District 208 / 3,834 |
| 779. | 20.8/sq mi | Leepertown Community Consolidated School District 175 / 398 |
| 780. | 20.8/sq mi | River Ridge Community Unit School District 210 / 3,566 |
| 781. | 20.8/sq mi | Cissna Park Community Unit School District 6 / 1,807 |
| 782. | 20.8/sq mi | Oakland Community Unit School District 5 / 1,856 |
| 783. | 20.8/sq mi | Jasper County Community Unit School District 1 / 9,430 |
| 784. | 20.7/sq mi | Hutsonville Community Unit School District 1 / 2,100 |
| 785. | 20.5/sq mi | Jamaica Community Unit School District 12 / 2,311 |
| 786. | 20.1/sq mi | Iuka Community Consolidated School District 7 / 1,930 |
| 787. | 20.1/sq mi | La Moille Community Unit School District 303 / 1,794 |
| 788. | 20.0/sq mi | Meredosia-Chambersburg Community Unit School District 11 / 1,669 |
| 789. | 20.0/sq mi | Stark County Community Unit School District 100 / 4,688 |
| 790. | 19.9/sq mi | Crescent Iroquois Community Unit School District 249 / 1,208 |
| 791. | 19.8/sq mi | Waverly Community Unit School District 6 / 1,885 |
| 792. | 19.8/sq mi | Rooks Creek Community Consolidated School District 425 / 625 |
| 793. | 19.7/sq mi | Liberty Community Unit School District 2 / 3,201 |
| 794. | 19.5/sq mi | West Prairie Community Unit School District 103 / 4,809 |
| 795. | 19.3/sq mi | Scott-Morgan Consolidated Unit School District 2 / 1,485 |
| 796. | 19.3/sq mi | Waltonville Community Unit School District 1 / 2,067 |
| 797. | 19.3/sq mi | West Central Community Unit School District 235 / 6,052 |
| 798. | 19.2/sq mi | Edgar County Community Unit District 6 / 2,415 |
| 799. | 19.2/sq mi | Ramsey Community Unit School District 204 / 2,709 |
| 800. | 19.1/sq mi | Greenview Community Unit School District 200 / 1,692 |
| 801. | 19.0/sq mi | Valmeyer Community Unit School District 3 / 2,579 |
| 802. | 18.8/sq mi | Virginia Community Unit School District 64 / 2,023 |
| 803. | 18.7/sq mi | Neponset Community Consolidated District 307 / 820 |
| 804. | 18.5/sq mi | Nettle Creek Community Consolidated School District 24C / 851 |
| 805. | 18.2/sq mi | Ewing Northern Community Consolidated District 115 / 1,710 |
| 806. | 18.2/sq mi | Triopia Community Unit School District 27 / 2,373 |
| 807. | 18.0/sq mi | Avon Community Unit School District 176 / 1,728 |
| 808. | 18.0/sq mi | North Clay Community Unit School District 25 / 3,746 |
| 809. | 17.8/sq mi | Schuyler-Industry Community Unit School District 5 / 7,745 |
| 810. | 17.7/sq mi | Milford Community Consolidated School District 280 / 3,975 |
| 810. | 17.7/sq mi | Milford Township High School District 233 / 3,975 |
| 812. | 17.7/sq mi | Brussels Community Unit School District 42 / 1,250 |
| 813. | 17.6/sq mi | A-C Central Community Unit School District 262 / 2,574 |
| 814. | 17.6/sq mi | Warsaw Community Unit School District 316 / 2,539 |
| 815. | 17.4/sq mi | Illini Central Community Unit School District 189 / 4,718 |
| 816. | 17.4/sq mi | Greenfield Community Unit School District 10 / 3,094 |
| 817. | 17.3/sq mi | Clay City Community Unit District 10 / 2,505 |
| 818. | 17.2/sq mi | V.I.T. Community Unit School District 2 / 2,461 |
| 819. | 17.2/sq mi | Paris Community Unit School District 4 / 3,997 |
| 820. | 17.1/sq mi | Eswood Community Consolidated District 269 / 743 |
| 821. | 17.0/sq mi | Annawan Community Unit School District 226 / 2,171 |
| 822. | 16.9/sq mi | Ridgeview Community Unit School District 19 / 3,350 |
| 823. | 16.8/sq mi | Community Unit School District 4 / 3,814 |
| 824. | 16.7/sq mi | Patoka Community Unit School District 100 / 1,692 |
| 825. | 16.4/sq mi | Wayne City Community Unit School District 100 / 3,702 |
| 826. | 16.4/sq mi | Kansas Community Unit School District 3 / 1,565 |
| 827. | 16.3/sq mi | Odell Community Consolidated School District 435 / 1,308 |
| 828. | 16.3/sq mi | Martinsville Community Unit School District 3C / 2,335 |
| 829. | 16.2/sq mi | Hoyleton Consolidated School District 29 / 977 |
| 830. | 16.0/sq mi | West Richland Community Unit School District 2 / 2,010 |
| 831. | 15.9/sq mi | Akin Community Consolidated School District 91 / 775 |
| 832. | 15.9/sq mi | Spoon River Valley Community Unit School District 4 / 2,505 |
| 833. | 15.9/sq mi | La Harpe Community School District 347 / 2,240 |
| 834. | 15.6/sq mi | Gallatin Community Unit School District 7 / 5,212 |
| 835. | 15.6/sq mi | New Hope Community Consolidated School District 6 / 1,512 |
| 836. | 15.6/sq mi | Farrington Community Consolidated School District 99 / 621 |
| 837. | 15.5/sq mi | United Community School District 304 / 5,873 |
| 838. | 15.4/sq mi | Donovan Community Unit School District 3 / 2,005 |
| 839. | 15.3/sq mi | Mount Pulaski Community Unit District 23 / 3,055 |
| 840. | 15.3/sq mi | Ohio Community Consolidated School District 17 / 736 |
| 841. | 15.0/sq mi | Oakdale Community Consolidated School District 1 / 714 |
| 842. | 14.9/sq mi | Cypress School District 64 / 888 |
| 843. | 14.9/sq mi | Northwestern Community Unit School District 2 / 2,079 |
| 844. | 14.8/sq mi | Western Community Unit School District 12 / 3,670 |
| 845. | 14.8/sq mi | Franklin Community Unit School District 1 / 2,004 |
| 846. | 14.7/sq mi | Ohio Community High School District 505 / 745 |
| 847. | 14.6/sq mi | Tri-Point Community Unit School District 6-J / 3,173 |
| 848. | 14.6/sq mi | Hartsburg-Emden Community Unit School District 21 / 1,063 |
| 849. | 14.4/sq mi | Morrisonville Community Unit School District 1 / 1,682 |
| 850. | 14.3/sq mi | Steward Elementary School District 220 / 717 |
| 851. | 14.3/sq mi | Lostant Community Unit School District 425 / 748 |
| 852. | 14.3/sq mi | DeLand-Weldon Community Unit School District 57 / 1,517 |
| 853. | 14.2/sq mi | Bradford Community Unit School District 1 / 1,654 |
| 854. | 14.1/sq mi | Griggsville-Perry Community Unit School District 4 / 2,079 |
| 855. | 14.1/sq mi | Deer Park Community Consolidated School District 82 / 718 |
| 856. | 13.9/sq mi | Cornell Community Consolidated School District 426 / 869 |
| 856. | 13.9/sq mi | Flanagan-Cornell District 74 in Cornell / 869 |
| 858. | 13.4/sq mi | Pleasant Hill Community Unit School District 3 / 1,977 |
| 859. | 13.2/sq mi | Panhandle Community Unit School District 2 / 2,280 |
| 860. | 13.0/sq mi | North Wayne Community Unit School District 200 / 2,556 |
| 861. | 12.8/sq mi | Shiloh Community Unit School District 1 / 2,965 |
| 862. | 12.7/sq mi | Allen Township Community Consolidated School District 65 / 820 |
| 863. | 12.6/sq mi | New Holland-Middletown Elementary School District 88 / 915 |
| 864. | 11.7/sq mi | Pope County Community Unit School District 1 / 4,362 |
| 865. | 11.5/sq mi | Shawnee Community Unit School District 84 / 2,425 |
| 866. | 11.3/sq mi | Southeastern Community Unit School District 337 / 3,067 |
| 867. | 10.8/sq mi | Armstrong Township High School District 225 / 1,455 |
| 868. | 10.8/sq mi | Saunemin Community Consolidated School District 438 / 908 |
| 869. | 10.4/sq mi | Armstrong-Ellis Consolidated School District 61 / 956 |
| 870. | 6.8/sq mi | Flanagan-Cornell District 74 in Rooks Creek / 2 |
| 871. | 6.1/sq mi | Flanagan-Cornell District 74 in Pontiac / 30 |
Please note that we only rank locations with 'Population Density' data. The rank above might not be a complete list. Locations without 'Population Density' data are not listed.
