| Rank | Average Family Size ▼ | School District / Population |
| 1. | 4.26 | Ford Heights School District 169 / 2,819 |
| 2. | 4.19 | Cicero School District 99 / 84,551 |
| 3. | 3.95 | Aurora East Unit School District 131 / 86,640 |
| 4. | 3.88 | Central Stickney School District 110 / 2,941 |
| 5. | 3.87 | J. Sterling Morton High School District 201 / 158,720 |
| 6. | 3.82 | Round Lake Community Unit School District 116 / 36,361 |
| 7. | 3.81 | General George Patton School District 133 / 2,341 |
| 7. | 3.81 | North Chicago School District 187 / 30,274 |
| 9. | 3.76 | Summit School District 104 / 12,302 |
| 9. | 3.76 | West Chicago School District 33 / 30,928 |
| 11. | 3.74 | Maywood-Melrose Park-Broadview School District 89 / 44,589 |
| 12. | 3.73 | Harvey School District 152 / 15,984 |
| 13. | 3.72 | Arthur Community Unit School District 305 / 5,616 |
| 14. | 3.71 | Waukegan Community Unit School District 60 / 84,015 |
| 14. | 3.71 | Posen-Robbins Elementary School District 143-5 / 12,497 |
| 16. | 3.69 | Mannheim School District 83 / 21,187 |
| 17. | 3.67 | Chicago Heights School District 170 / 24,563 |
| 18. | 3.66 | Berwyn North School District 98 / 25,290 |
| 19. | 3.65 | Berkeley School District 87 / 22,015 |
| 20. | 3.64 | Community Consolidated School District 168 / 10,382 |
| 21. | 3.63 | Queen Bee School District 16 / 17,627 |
| 21. | 3.63 | Plainfield School District 202 / 120,091 |
| 21. | 3.63 | Bellwood School District 88 / 22,662 |
| 24. | 3.61 | Lincoln Elementary School District 156 / 6,883 |
| 25. | 3.60 | West Harvey-Dixmoor Public School District 147 / 11,588 |
| 26. | 3.59 | Community High School District 94 / 41,954 |
| 26. | 3.59 | Berwyn South School District 100 / 31,367 |
| 28. | 3.58 | Reavis Township High School District 220 / 33,299 |
| 29. | 3.57 | Valley View Community Unit School District 365U / 92,516 |
| 30. | 3.56 | Zion Elementary School District 6 / 17,472 |
| 31. | 3.55 | Burbank School District 111 / 30,360 |
| 32. | 3.54 | Calumet City School District 155 / 11,593 |
| 33. | 3.53 | Depue Community Unit School District 103 / 2,032 |
| 34. | 3.51 | Diamond Lake School District 76 / 9,187 |
| 35. | 3.50 | South Holland School District 151 / 13,239 |
| 36. | 3.49 | Addison School District 4 / 37,309 |
| 36. | 3.49 | Franklin Park School District 84 / 11,276 |
| 36. | 3.49 | East Prairie School District 73 / 4,617 |
| 36. | 3.49 | Summit Hill School District 161 / 23,469 |
| 40. | 3.48 | School District U-46 / 231,224 |
| 40. | 3.48 | Bloom Township High School District 206 / 64,796 |
| 40. | 3.48 | Hazel Crest School District 152-5 / 7,977 |
| 43. | 3.47 | Prairie-Hills Elementary School District 144 / 21,563 |
| 43. | 3.47 | Rhodes School District 84-5 / 4,618 |
| 43. | 3.47 | Joliet Public School District 86 / 84,281 |
| 43. | 3.47 | Proviso Township High School District 209 / 126,613 |
| 47. | 3.46 | Dolton School District 148 / 21,911 |
| 48. | 3.45 | Oswego Community Unit School District 308 / 75,151 |
| 49. | 3.44 | Millburn Community Consolidated School District 24 / 8,613 |
| 49. | 3.44 | Leyden Community High School District 212 / 64,119 |
| 49. | 3.44 | Plano Community Unit School District 88 / 11,288 |
| 49. | 3.44 | Cook County School District 130 / 30,111 |
| 53. | 3.43 | Thornton Township High School District 205 / 115,320 |
| 54. | 3.42 | Hinsdale Community Consolidated School District 181 / 25,449 |
| 55. | 3.41 | Mundelein Elementary School District 75 / 15,091 |
| 55. | 3.41 | Bensenville School District 2 / 19,502 |
| 55. | 3.41 | Teutopolis Community Unit School District 50 / 5,674 |
| 55. | 3.41 | Harvard Community Unit School District 50 / 13,486 |
| 55. | 3.41 | Minooka Community Consolidated School District 201 / 23,634 |
| 55. | 3.41 | Skokie School District 73-5 / 9,851 |
| 61. | 3.40 | Lincolnwood School District 74 / 12,590 |
| 61. | 3.40 | Western Springs School District 101 / 10,175 |
| 61. | 3.40 | Winnetka School District 36 / 11,932 |
| 61. | 3.40 | Chicago Public School District 299 / 2,695,669 |
| 65. | 3.39 | Midlothian School District 143 / 14,986 |
| 65. | 3.39 | Cahokia Community Unit School District 187 / 19,392 |
| 65. | 3.39 | Joliet Township High School District 204 / 128,595 |
| 65. | 3.39 | Aurora West Unit School District 129 / 73,278 |
| 69. | 3.38 | Minooka Community High School District 111 / 38,032 |
| 69. | 3.38 | Kenilworth School District 38 / 2,803 |
| 69. | 3.38 | Manhattan School District 114 / 9,175 |
| 69. | 3.38 | Arcola Consolidated Unit School District 306 / 4,465 |
| 69. | 3.38 | Fenton Community High School District 100 / 29,995 |
| 69. | 3.38 | Argo Community High School District 217 / 40,473 |
| 75. | 3.37 | Grayslake Consolidated Community School District 46 / 30,258 |
| 75. | 3.37 | Indian Prairie Community Unit School District 204 / 127,333 |
| 75. | 3.37 | Community Unit School District 300 / 110,689 |
| 78. | 3.36 | Marquardt School District 15 / 25,839 |
| 78. | 3.36 | East St. Louis School District 189 / 38,523 |
| 78. | 3.36 | Country Club Hills School District 160 / 12,684 |
| 78. | 3.36 | Lincoln Way Community High School District 210 / 104,129 |
| 78. | 3.36 | Mundelein Consolidated High School District 120 / 42,836 |
| 78. | 3.36 | Will County School District 92 / 14,695 |
| 84. | 3.35 | Ridgeland School District 122 / 21,718 |
| 84. | 3.35 | Cary Community Consolidated School District 26 / 22,870 |
| 84. | 3.35 | North Boone Community Unit School District 200 / 8,540 |
| 84. | 3.35 | New Lenox School District 122 / 38,647 |
| 84. | 3.35 | Channahon School District 17 / 10,196 |
| 84. | 3.35 | Community Consolidated School District 93 / 34,388 |
| 90. | 3.34 | Zion-Benton Township High School District 126 / 44,411 |
| 90. | 3.34 | Homer Community Consolidated School District 33C / 29,575 |
| 92. | 3.33 | Wood Dale School District 7 / 10,493 |
| 92. | 3.33 | Yorkville Community Unit School District 115 / 28,319 |
| 92. | 3.33 | Grayslake Community High School District 127 / 44,566 |
| 92. | 3.33 | Bremen Community High School District 228 / 93,733 |
| 96. | 3.32 | Belvidere Consolidated Unit School District 100 / 45,236 |
| 96. | 3.32 | Lisbon Community Consolidated School District 90 / 883 |
| 96. | 3.32 | DuPage High School District 88 / 82,260 |
| 96. | 3.32 | Central Community Unit School District 301 / 17,995 |
| 100. | 3.31 | Burnham School District 154-5 / 1,545 |
| 100. | 3.31 | Elmhurst School District 205 / 46,804 |
| 100. | 3.31 | Pembroke Consolidated Community School District 259 / 1,947 |
| 100. | 3.31 | Evergreen Park Community High School District 231 / 19,852 |
| 100. | 3.31 | Thornton Fractional Township High School District 215 / 60,428 |
| 100. | 3.31 | Evergreen Park Elementary School District 124 / 19,852 |
| 106. | 3.30 | Troy Community Consolidated School District 30C / 36,786 |
| 106. | 3.30 | Keeneyville School District 20 / 14,368 |
| 106. | 3.30 | St. George Community Consolidated School District 258 / 3,760 |
| 106. | 3.30 | Beach Park Community Consolidated School District 3 / 20,315 |
| 106. | 3.30 | Lake Villa Community Consolidated School District 41 / 23,218 |
| 106. | 3.30 | Crystal Lake Community Consolidated School District 47 / 62,267 |
| 106. | 3.30 | Calumet Public School District 132 / 10,763 |
| 106. | 3.30 | Community High School District 155 / 96,797 |
| 114. | 3.29 | Lindop School District 92 / 4,121 |
| 114. | 3.29 | Glen Ellyn School District 41 / 28,833 |
| 114. | 3.29 | Lyons School District 103 / 21,645 |
| 114. | 3.29 | Mokena School District 159 / 17,118 |
| 114. | 3.29 | Taft School District 90 / 3,456 |
| 114. | 3.29 | Woodland Community Consolidated School District 50 / 51,327 |
| 120. | 3.28 | Lemont Township High School District 210 / 25,565 |
| 120. | 3.28 | Glenbard Township High School District 87 / 164,057 |
| 120. | 3.28 | Lemont-Bromberek Combined School District 113A / 25,220 |
| 120. | 3.28 | Kirby School District 140 / 35,953 |
| 120. | 3.28 | Indian Springs School District 109 / 24,463 |
| 125. | 3.27 | Kaneland Community Unit School District 302 / 25,685 |
| 125. | 3.27 | St. Charles Community Unit School District 303 / 67,777 |
| 125. | 3.27 | North Palos School District 117 / 28,214 |
| 125. | 3.27 | Warren Township High School District 121 / 68,588 |
| 125. | 3.27 | Oak Lawn Community High School District 229 / 39,602 |
| 125. | 3.27 | Laraway Community Consolidated School District 70C / 2,838 |
| 125. | 3.27 | Schiller Park School District 81 / 13,266 |
| 125. | 3.27 | Benjamin School District 25 / 6,927 |
| 133. | 3.26 | Batavia Unit School District 101 / 32,000 |
| 133. | 3.26 | Skokie-Fairview School District 72 / 6,317 |
| 133. | 3.26 | Dolton School District 149 / 28,278 |
| 133. | 3.26 | Geneva Community Unit School District 304 / 28,816 |
| 137. | 3.25 | Lake Zurich Community Unit School District 95 / 31,319 |
| 137. | 3.25 | Prairie Grove Community School District 46 / 7,351 |
| 137. | 3.25 | Kankakee School District 111 / 32,915 |
| 137. | 3.25 | Chaney-Monge School District 88 / 7,708 |
| 137. | 3.25 | Genoa-Kingston Community Unit School District 424 / 9,221 |
| 137. | 3.25 | Frankfort Community Consolidated School District 157C / 17,238 |
| 137. | 3.25 | Wilmette School District 39 / 26,119 |
| 137. | 3.25 | Niles Township Community High School District 219 / 95,983 |
| 145. | 3.24 | Villa Park School District 45 / 36,731 |
| 145. | 3.24 | New Trier Township High School District 203 / 59,796 |
| 145. | 3.24 | Community High School District 218 / 121,648 |
| 145. | 3.24 | Barrington Community Unit School District 220 / 44,132 |
| 145. | 3.24 | Albers School District 63 / 1,405 |
| 150. | 3.23 | Hoover-Schrum Memorial School District 157 / 7,897 |
| 150. | 3.23 | Kildeer Countryside Community Consolidated School District 96 / 23,683 |
| 150. | 3.23 | Opdyke-Belle Rive Community Consolidated School District 5 / 1,957 |
| 150. | 3.23 | Antioch Community Consolidated School District 34 / 23,861 |
| 150. | 3.23 | Skokie School District 69 / 17,838 |
| 150. | 3.23 | Matteson Elementary School District 162 / 25,603 |
| 150. | 3.23 | Oak Grove School District 68 / 6,778 |
| 150. | 3.23 | Mascoutah Community Unit School District 19 / 17,297 |
| 158. | 3.22 | River Trails School District 26 / 15,201 |
| 158. | 3.22 | East Maine School District 63 / 46,817 |
| 158. | 3.22 | Lockport Township High School District 205 / 75,869 |
| 158. | 3.22 | Golf Elementary School District 67 / 6,738 |
| 158. | 3.22 | Glencoe School District 35 / 8,528 |
| 158. | 3.22 | Hawthorn Community Consolidated School District 73 / 29,650 |
| 158. | 3.22 | LaGrange School District 102 / 25,967 |
| 158. | 3.22 | Huntley Consolidated School District 158 / 42,582 |
| 166. | 3.21 | Richmond-Burton Community High School District 157 / 11,686 |
| 166. | 3.21 | St. Rose School District 14-15 / 1,257 |
| 166. | 3.21 | Community Unit School District 200 / 78,828 |
| 166. | 3.21 | Elmwood Park Community Unit School District 401 / 24,883 |
| 166. | 3.21 | Flossmoor School District 161 / 21,384 |
| 166. | 3.21 | Brooklyn Community Unit School District 188 / 749 |
| 166. | 3.21 | Bartelso School District 57 / 1,080 |
| 166. | 3.21 | Nippersink School District 2 / 11,686 |
| 166. | 3.21 | Peotone Community Unit School District 207U / 11,012 |
| 166. | 3.21 | South Holland School District 150 / 10,626 |
| 166. | 3.21 | Sandridge School District 172 / 3,633 |
| 166. | 3.21 | Alsip-Hazelgreen-Oaklawn School District 126 / 16,956 |
| 178. | 3.20 | Sunnybrook School District 171 / 10,986 |
| 178. | 3.20 | Dieterich Community Unit School District 30 / 2,307 |
| 178. | 3.20 | Hiawatha Community Unit School District 426 / 3,324 |
| 178. | 3.20 | Des Plaines Community Consolidated School District 62 / 51,614 |
| 178. | 3.20 | Glenview Community Consolidated School District 34 / 40,086 |
| 178. | 3.20 | Rich Township High School District 227 / 69,376 |
| 178. | 3.20 | Arbor Park School District 145 / 12,993 |
| 185. | 3.19 | River Forest School District 90 / 11,172 |
| 185. | 3.19 | Libertyville School District 70 / 18,900 |
| 185. | 3.19 | Woodstock Community Unit School District 200 / 37,384 |
| 185. | 3.19 | Marengo-Union Elementary Consolidated District 165 / 10,535 |
| 185. | 3.19 | Forest Ridge School District 142 / 16,188 |
| 185. | 3.19 | Wauconda Community Unit School District 118 / 27,202 |
| 185. | 3.19 | Schaumburg Community Consolidated School District 54 / 133,846 |
| 185. | 3.19 | Maine Township High School District 207 / 144,788 |
| 185. | 3.19 | Prairie Hill Community Consolidated School District 133 / 4,906 |
| 185. | 3.19 | Beardstown Community Unit School District 15 / 8,052 |
| 195. | 3.18 | Rockdale School District 84 / 2,182 |
| 195. | 3.18 | Skokie School District 68 / 21,137 |
| 195. | 3.18 | Libertyville Community High School District 128 / 49,926 |
| 195. | 3.18 | Park Forest School District 163 / 15,766 |
| 195. | 3.18 | Naperville Community Unit District 203 / 94,748 |
| 195. | 3.18 | McHenry Community Consolidated School District 15 / 42,844 |
| 201. | 3.17 | Brookwood School District 167 / 10,852 |
| 201. | 3.17 | Beecher Community Unit School District 200U / 6,643 |
| 201. | 3.17 | Orland School District 135 / 55,192 |
| 201. | 3.17 | Elementary School District 159 / 19,795 |
| 201. | 3.17 | Seneca Community Consolidated School District 170 / 3,666 |
| 201. | 3.17 | Atwood Heights School District 125 / 7,607 |
| 201. | 3.17 | Township High School District 211 / 236,230 |
| 201. | 3.17 | Lyons Township High School District 204 / 68,725 |
| 201. | 3.17 | Meridian Community Unit School District 223 / 9,100 |
| 201. | 3.17 | Homewood-Flossmoor Community High School District 233 / 38,253 |
| 201. | 3.17 | Gurnee School District 56 / 18,189 |
| 201. | 3.17 | McHenry Community High School District 156 / 46,091 |
| 201. | 3.17 | Consolidated High School District 230 / 155,955 |
| 201. | 3.17 | Lansing School District 158 / 22,962 |
| 201. | 3.17 | Antioch Community High School District 117 / 45,037 |
| 216. | 3.16 | LaGrange School District 105 / 11,749 |
| 216. | 3.16 | Tremont Community Unit School District 702 / 5,022 |
| 216. | 3.16 | Newark Community High School District 18 / 3,549 |
| 216. | 3.16 | Hillside School District 93 / 5,713 |
| 216. | 3.16 | Johnsburg Community Unit School District 12 / 12,438 |
| 216. | 3.16 | Morton Grove School District 70 / 9,146 |
| 216. | 3.16 | Venice Community Unit School District 3 / 1,027 |
| 216. | 3.16 | Eureka Community Unit District 140 / 9,685 |
| 216. | 3.16 | Deerfield School District 109 / 20,693 |
| 216. | 3.16 | Tri-Valley Community Unit School District 3 / 4,680 |
| 216. | 3.16 | Lake Bluff Elementary School District 65 / 8,876 |
| 216. | 3.16 | Rochelle Community Consolidated District 231 / 13,647 |
| 216. | 3.16 | Oak Lawn-Hometown School District 123 / 34,793 |
| 216. | 3.16 | Madison Community Unit School District 12 / 4,627 |
| 216. | 3.16 | Hinsdale Township High School District 86 / 74,146 |
| 231. | 3.15 | Lincolnshire-Prairieview School District 103 / 12,555 |
| 231. | 3.15 | Lombard School District 44 / 34,968 |
| 231. | 3.15 | Marengo Community High School District 154 / 13,933 |
| 231. | 3.15 | Homewood School District 153 / 16,438 |
| 231. | 3.15 | Grant Community High School District 124 / 36,905 |
| 231. | 3.15 | Park Ridge Consolidated Community School District 64 / 40,255 |
| 231. | 3.15 | Roselle School District 12 / 7,126 |
| 231. | 3.15 | Adlai E. Stevenson High School District 125 / 61,187 |
| 231. | 3.15 | Big Hollow School District 38 / 14,379 |
| 231. | 3.15 | Grant Park Community Unit School District 6 / 3,291 |
| 231. | 3.15 | Palatine Community Consolidated School District 15 / 119,054 |
| 231. | 3.15 | Fremont School District 79 / 19,330 |
| 231. | 3.15 | Norridge School District 80 / 12,288 |
| 231. | 3.15 | Chicago Ridge School District 127-5 / 13,312 |
| 231. | 3.15 | Wheeling Community Consolidated School District 21 / 67,047 |
| 246. | 3.14 | Community Consolidated School District 59 / 65,398 |
| 246. | 3.14 | Kinnikinnick Community Consolidated School District 131 / 14,449 |
| 246. | 3.14 | Fox River Grove Consolidated School District 3 / 4,309 |
| 246. | 3.14 | Lake Park Community High School District 108 / 51,172 |
| 246. | 3.14 | O'Fallon Community Consolidated School District 90 / 28,351 |
| 246. | 3.14 | Germantown Hills School District 69 / 6,607 |
| 252. | 3.13 | Steger School District 194 / 14,120 |
| 252. | 3.13 | Aviston School District 21 / 2,527 |
| 252. | 3.13 | Township High School District 113 / 58,323 |
| 252. | 3.13 | Valmeyer Community Unit School District 3 / 2,549 |
| 252. | 3.13 | Northbrook School District 28 / 13,883 |
| 252. | 3.13 | Sandwich Community Unit School District 430 / 13,473 |
| 252. | 3.13 | Rochelle Township High School District 212 / 17,129 |
| 252. | 3.13 | Worth School District 127 / 11,211 |
| 252. | 3.13 | Somonauk Community Unit School District 432 / 5,067 |
| 252. | 3.13 | Township High School District 214 / 251,203 |
| 252. | 3.13 | Riverside School District 96 / 13,845 |
| 252. | 3.13 | Lake Forest Community High School District 115 / 28,251 |
| 264. | 3.12 | Grand Ridge Community Consolidated School District 95 / 2,515 |
| 264. | 3.12 | Central Community High School District 71 / 16,161 |
| 264. | 3.12 | Lee Center Community Unit School District 271 / 1,680 |
| 264. | 3.12 | Heyworth Community Unit School District 4 / 4,876 |
| 264. | 3.12 | Ridgewood Community High School District 234 / 19,327 |
| 264. | 3.12 | Dunlap Community Unit School District 323 / 21,427 |
| 264. | 3.12 | Community Consolidated School District 180 / 6,247 |
| 264. | 3.12 | Lake Forest School District 67 / 19,064 |
| 264. | 3.12 | Itasca School District 10 / 8,761 |
| 273. | 3.11 | Wolf Branch School District 113 / 7,450 |
| 273. | 3.11 | Crete-Monee Community Unit School District 201-U / 33,181 |
| 273. | 3.11 | O'Fallon Township High School District 203 / 39,280 |
| 273. | 3.11 | North Shore School District 112 / 35,413 |
| 273. | 3.11 | Mount Prospect School District 57 / 20,249 |
| 273. | 3.11 | Mendota Community Consolidated School District 289 / 10,782 |
| 273. | 3.11 | Germantown School District 60 / 1,923 |
| 273. | 3.11 | Union School District 81 / 1,480 |
| 273. | 3.11 | Mendota Township High School District 280 / 10,823 |
| 273. | 3.11 | Malden Community Consolidated School District 84 / 748 |
| 273. | 3.11 | Princeville Community Unit School District 326 / 4,007 |
| 284. | 3.10 | Buncombe Consolidated School District 43 / 693 |
| 284. | 3.10 | Thornton School District 154 / 2,821 |
| 284. | 3.10 | Northfield Township High School District 225 / 85,747 |
| 284. | 3.10 | Riverside Brookfield Township School District 208 / 29,195 |
| 284. | 3.10 | Damiansville School District 62 / 836 |
| 284. | 3.10 | Saratoga Community Consolidated School District 60C / 5,979 |
| 284. | 3.10 | Harrison School District 36 / 4,079 |
| 284. | 3.10 | Ludlow Community Consolidated School District 142 / 918 |
| 284. | 3.10 | Union Ridge School District 86 / 6,351 |
| 284. | 3.10 | Arlington Heights School District 25 / 50,029 |
| 284. | 3.10 | Seneca Township High School District 160 / 7,164 |
| 284. | 3.10 | Bradley-Bourbonnais Consolidated High School District 307 / 40,203 |
| 284. | 3.10 | Eswood Community Consolidated District 269 / 890 |
| 284. | 3.10 | Hononegah Community High School District 207 / 33,193 |
| 298. | 3.09 | Newark Community Consolidated School District 66 / 2,539 |
| 298. | 3.09 | Brookfield School District 95 / 10,887 |
| 298. | 3.09 | Downers Grove Grade School District 58 / 51,875 |
| 298. | 3.09 | Bourbonnais School District 53 / 24,087 |
| 298. | 3.09 | Gavin School District 37 / 8,227 |
| 298. | 3.09 | Hollis Consolidated School District 328 / 715 |
| 304. | 3.08 | Oakdale Community Consolidated School District 1 / 733 |
| 304. | 3.08 | Central School District 51 / 8,344 |
| 304. | 3.08 | Lockport School District 91 / 6,646 |
| 304. | 3.08 | Community Consolidated School District 146 / 26,449 |
| 304. | 3.08 | Metamora Community Consolidated School District 1 / 6,891 |
| 304. | 3.08 | Carbon Cliff-Barstow School District 36 / 1,775 |
| 304. | 3.08 | Signal Hill School District 181 / 3,232 |
| 304. | 3.08 | Deer Creek-Mackinaw Community Unit School District 701 / 6,016 |
| 304. | 3.08 | Woodridge School District 68 / 32,571 |
| 304. | 3.08 | Triad Community Unit School District 2 / 20,984 |
| 304. | 3.08 | Indian Creek Community Unit District 425 / 4,690 |
| 304. | 3.08 | Elwood Community Consolidated School District 203 / 3,765 |
| 304. | 3.08 | St. Anne Community High School District 302 / 4,894 |
| 304. | 3.08 | Winnebago Community Unit School District 323 / 8,157 |
| 304. | 3.08 | Coal City Community Unit School District 1 / 11,262 |
| 304. | 3.08 | Rockford School District 205 / 193,932 |
| 304. | 3.08 | Rochester Community Unit School District 3A / 10,434 |
| 304. | 3.08 | DeKalb Community Unit School District 428 / 52,734 |
| 304. | 3.08 | Sycamore Community Unit School District 427 / 21,667 |
| 323. | 3.07 | Bradley School District 61 / 12,356 |
| 323. | 3.07 | Prairie Central Community Unit School District 8 / 11,294 |
| 323. | 3.07 | Saunemin Community Consolidated School District 438 / 1,019 |
| 323. | 3.07 | Earlville Community Unit School District 9 / 2,708 |
| 323. | 3.07 | Evanston Community Consolidated School District 65 / 82,370 |
| 323. | 3.07 | Winfield School District 34 / 4,099 |
| 323. | 3.07 | Gardner Community Consolidated School District 72C / 1,823 |
| 323. | 3.07 | Reed Custer Community Unit School District 255U / 9,368 |
| 323. | 3.07 | Community High School District 99 / 109,523 |
| 323. | 3.07 | Oak Park and River Forest District 200 / 63,050 |
| 323. | 3.07 | Columbia Community Unit School District 4 / 12,302 |
| 323. | 3.07 | Mahomet-Seymour Community Unit School District 3 / 14,300 |
| 323. | 3.07 | Evanston Township High School District 202 / 82,370 |
| 336. | 3.06 | Braceville School District 75 / 1,411 |
| 336. | 3.06 | Elmwood Community Unit School District 322 / 3,965 |
| 336. | 3.06 | Alden-Hebron School District 19 / 3,095 |
| 336. | 3.06 | Breese School District 12 / 7,133 |
| 336. | 3.06 | Komarek School District 94 / 4,762 |
| 336. | 3.06 | Manteno Community Unit School District 5 / 12,432 |
| 336. | 3.06 | St. Joseph Community Consolidated School District 169 / 6,191 |
| 336. | 3.06 | Metamora Township High School District 122 / 16,146 |
| 336. | 3.06 | Momence Community Unit School District 1 / 7,104 |
| 336. | 3.06 | Hinckley-Big Rock Community Unit School District 429 / 4,862 |
| 336. | 3.06 | Byron Community Unit School District 226 / 7,741 |
| 347. | 3.05 | Medinah School District 11 / 7,372 |
| 347. | 3.05 | Riley Community Consolidated School District 18 / 3,398 |
| 347. | 3.05 | McLean County Unit School District 5 / 94,219 |
| 347. | 3.05 | Lowpoint-Washburn Community Unit School District 21 / 2,511 |
| 347. | 3.05 | Smithton Community Consolidated School District 130 / 4,541 |
| 347. | 3.05 | Westmont Community Unit School District 201 / 12,549 |
| 347. | 3.05 | Gower School District 62 / 9,627 |
| 347. | 3.05 | Miller Township Community Consolidated School District / 2,337 |
| 347. | 3.05 | Fairmont School District 89 / 3,683 |
| 347. | 3.05 | Iroquois West Community Unit School District 10 / 5,123 |
| 347. | 3.05 | Shiloh Village School District 85 / 5,027 |
| 347. | 3.05 | Leland Community Unit School District 1 / 1,824 |
| 347. | 3.05 | Kewanee Community Unit School District 229 / 10,251 |
| 360. | 3.04 | Darien School District 61 / 16,556 |
| 360. | 3.04 | Washington School District 52 / 8,028 |
| 360. | 3.04 | Pennoyer School District 79 / 5,622 |
| 360. | 3.04 | Bloomingdale School District 13 / 13,545 |
| 360. | 3.04 | Roanoke-Benson Community Unit School District 60 / 3,443 |
| 360. | 3.04 | Brimfield Community Unit School District 309 / 3,936 |
| 360. | 3.04 | Peoria School District 150 / 100,765 |
| 360. | 3.04 | Pleasant Hill School District 69 / 2,036 |
| 360. | 3.04 | Creston Community Consolidated School District 161 / 959 |
| 360. | 3.04 | Rosemont Elementary School District 78 / 2,360 |
| 360. | 3.04 | Mazon-Verona-Kinsman Elementary School District 2C / 2,563 |
| 360. | 3.04 | Oak Park Elementary School District 97 / 51,878 |
| 360. | 3.04 | Liberty Community Unit School District 2 / 3,377 |
| 360. | 3.04 | Southeastern Community Unit School District 337 / 3,209 |
| 360. | 3.04 | Bannockburn School District 106 / 2,228 |
| 360. | 3.04 | Herscher Community Unit School District 2 / 10,903 |
| 376. | 3.03 | Morris Community High School District 101 / 18,332 |
| 376. | 3.03 | Westchester School District 92-5 / 15,824 |
| 376. | 3.03 | Glen Ellyn Community Consolidated School District 89 / 22,402 |
| 376. | 3.03 | Silvis School District 34 / 5,282 |
| 376. | 3.03 | Rondout School District 72 / 1,740 |
| 376. | 3.03 | Akin Community Consolidated School District 91 / 805 |
| 376. | 3.03 | River Grove School District 85-5 / 8,085 |
| 376. | 3.03 | Center Cass School District 66 / 11,145 |
| 376. | 3.03 | Altamont Community Unit School District 10 / 4,922 |
| 376. | 3.03 | Pecatonica Community Unit School District 321 / 5,261 |
| 376. | 3.03 | Auburn Community Unit School District 10 / 6,959 |
| 376. | 3.03 | Thomasboro Community Consolidated School District 130 / 2,443 |
| 376. | 3.03 | Bradford Community Unit School District 1 / 1,655 |
| 376. | 3.03 | Central Community Unit School District 4 / 6,428 |
| 376. | 3.03 | Whiteside School District 115 / 12,981 |
| 376. | 3.03 | El Paso-Gridley Community Unit School District 11 / 7,019 |
| 376. | 3.03 | Kell Consolidated School District 2 / 1,023 |
| 376. | 3.03 | Community Unit School District 2 / 6,325 |
| 376. | 3.03 | Iuka Community Consolidated School District 7 / 1,966 |
| 376. | 3.03 | Lostant Community Unit School District 425 / 912 |
| 376. | 3.03 | Williamsville Community Unit School District 15 / 7,226 |
| 397. | 3.02 | Southwestern Community Unit School District 9 / 9,504 |
| 397. | 3.02 | Avoca School District 37 / 6,248 |
| 397. | 3.02 | Camp Point Community Unit School District 3 / 5,029 |
| 397. | 3.02 | Odell Community Consolidated School District 435 / 1,440 |
| 397. | 3.02 | Gardner-South Wilmington Township High School District / 4,126 |
| 397. | 3.02 | Rockton School District 140 / 12,459 |
| 397. | 3.02 | Webber Township High School District 204 / 2,958 |
| 397. | 3.02 | Ashton Community Unit School District 275 / 3,894 |
| 397. | 3.02 | Nettle Creek Community Consolidated School District 24C / 929 |
| 397. | 3.02 | St. Joseph-Ogden Community High School District 305 / 8,321 |
| 397. | 3.02 | Washington Community High School District 308 / 23,441 |
| 408. | 3.01 | Cass School District 63 / 8,331 |
| 408. | 3.01 | Ramsey Community Unit School District 204 / 2,683 |
| 408. | 3.01 | Highland Community Unit School District 5 / 18,631 |
| 408. | 3.01 | Harlem Unit School District 122 / 44,272 |
| 408. | 3.01 | Fieldcrest Community Unit School District 6 / 6,671 |
| 408. | 3.01 | Streator Township High School District 40 / 18,532 |
| 408. | 3.01 | Sunset Ridge School District 29 / 4,166 |
| 408. | 3.01 | South Pekin School District 137 / 1,791 |
| 408. | 3.01 | Galatia Community Unit School District 1 / 2,384 |
| 408. | 3.01 | Pearl City Community Unit School District 200 / 2,690 |
| 408. | 3.01 | Wilmington Community Unit School District 209U / 9,403 |
| 408. | 3.01 | Morrisonville Community Unit School District 1 / 1,898 |
| 408. | 3.01 | Pleasantdale School District 107 / 8,144 |
| 408. | 3.01 | Aptakisic-Tripp Community Consolidated School District / 18,649 |
| 422. | 3.00 | Trico Community Unit School District 176 / 6,525 |
| 422. | 3.00 | Streator Elementary School District 44 / 16,896 |
| 422. | 3.00 | Monmouth-Roseville Community Unit School District 238 / 11,475 |
| 422. | 3.00 | Niles Elementary School District 71 / 7,749 |
| 422. | 3.00 | LaSalle Elementary School District 122 / 9,113 |
| 422. | 3.00 | LaGrange Highlands School District 106 / 9,306 |
| 422. | 3.00 | Wesclin Community Unit School District 3 / 8,025 |
| 422. | 3.00 | Rock Falls Elementary School District 13 / 7,961 |
| 422. | 3.00 | Donovan Community Unit School District 3 / 2,228 |
| 422. | 3.00 | Edwardsville Community Unit School District 7 / 51,423 |
| 422. | 3.00 | Le Roy Community Unit School District 2 / 4,448 |
| 422. | 3.00 | Stewardson-Strasburg Community Unit District 5A / 2,577 |
| 422. | 3.00 | Northbrook Elementary School District 27 / 10,997 |
| 422. | 3.00 | Cobden School Unit District 17 / 3,538 |
| 422. | 3.00 | Potomac Community Unit School District 10 / 1,241 |
| 422. | 3.00 | Rantoul City School District 137 / 12,520 |
| 422. | 3.00 | Chester Non-High School District 122 / 899 |
| 422. | 3.00 | South Beloit Community Unit School District 320 / 6,409 |
| 422. | 3.00 | Prairie du Rocher Community Consolidated School District 134 / 899 |
| 422. | 3.00 | Danville Community Consolidated School District 118 / 39,922 |
| 422. | 3.00 | Morris School District 54 / 11,610 |
| 422. | 3.00 | North Pekin-Marquette Heights School District 102 / 5,245 |
| 444. | 2.99 | Spring Valley Community Consolidated School District 99 / 6,170 |
| 444. | 2.99 | Lisle Community Unit School District 202 / 13,642 |
| 444. | 2.99 | Dwight Township High School District 230 / 6,605 |
| 444. | 2.99 | Rantoul Township High School District 193 / 17,512 |
| 444. | 2.99 | Dwight Common School District 232 / 6,317 |
| 444. | 2.99 | Granite City Community Unit School District 9 / 43,938 |
| 444. | 2.99 | Heritage Community Unit School District 8 / 3,107 |
| 444. | 2.99 | Hoopeston Area Community Unit School District 11 / 7,293 |
| 444. | 2.99 | Tolono Community Unit School District 7 / 9,017 |
| 444. | 2.99 | Collinsville Community Unit School District 10 / 48,441 |
| 444. | 2.99 | Pleasant Plains Community Unit School District 8 / 7,634 |
| 444. | 2.99 | Freeburg Community High School District 77 / 12,887 |
| 444. | 2.99 | Butler School District 53 / 4,918 |
| 444. | 2.99 | Winthrop Harbor School District 1 / 6,628 |
| 444. | 2.99 | Shirland Community Consolidated School District 134 / 1,379 |
| 444. | 2.99 | Allendale Community Consolidated School District 17 / 1,020 |
| 460. | 2.98 | Bluford Community Consolidated School District 114 / 2,579 |
| 460. | 2.98 | Belle Valley School District 119 / 8,407 |
| 460. | 2.98 | Prophetstown-Lyndon-Tampico Community Unit School District 3 / 5,781 |
| 460. | 2.98 | Cowden-Herrick Community Unit School District 3A / 2,649 |
| 460. | 2.98 | Cairo Community Unit School District 1 / 3,218 |
| 460. | 2.98 | Palos Community Consolidated School District 118 / 23,391 |
| 460. | 2.98 | Wood River-Hartford Elementary School District 15 / 6,060 |
| 460. | 2.98 | Ewing Northern Community Consolidated District 115 / 1,763 |
| 460. | 2.98 | Bement Community Unit School District 5 / 2,399 |
| 460. | 2.98 | Neoga Community Unit School District 3 / 4,882 |
| 460. | 2.98 | Pawnee Community Unit School District 11 / 3,350 |
| 460. | 2.98 | Meridian Community Unit School District 101 / 3,533 |
| 460. | 2.98 | Meredosia-Chambersburg Community Unit School District 11 / 1,738 |
| 460. | 2.98 | Maroa-Forsyth Community Unit School District 2 / 6,359 |
| 460. | 2.98 | Annawan Community Unit School District 226 / 2,094 |
| 460. | 2.98 | Tonica Community Consolidated School District 79 / 1,596 |
| 476. | 2.97 | Sterling Community Unit District 5 / 22,066 |
| 476. | 2.97 | Jersey Community Unit School District 100 / 20,217 |
| 476. | 2.97 | La Moille Community Unit School District 303 / 1,769 |
| 476. | 2.97 | Bethel School District 82 / 1,205 |
| 476. | 2.97 | Nashville Consolidated Community School District 49 / 5,553 |
| 476. | 2.97 | Rossville-Alvin Community Unit School District 7 / 2,390 |
| 476. | 2.97 | North Greene Unit School District 3 / 6,263 |
| 476. | 2.97 | Waterloo Community Unit School District 5 / 17,917 |
| 476. | 2.97 | Rutland Community Consolidated School District 230 / 843 |
| 476. | 2.97 | Payson Community Unit School District 1 / 3,278 |
| 476. | 2.97 | Marseilles Elementary School District 150 / 4,537 |
| 476. | 2.97 | Elverado Community Unit School District 196 / 3,108 |
| 476. | 2.97 | Amboy Community Unit School District 272 / 5,261 |
| 476. | 2.97 | Northbrook/Glenview School District 30 / 10,957 |
| 476. | 2.97 | Atwood-Hammond Community Unit School District 39 / 2,605 |
| 476. | 2.97 | Pontiac Township High School District 90 / 16,496 |
| 476. | 2.97 | Cissna Park Community Unit School District 6 / 1,826 |
| 476. | 2.97 | Bethalto Consolidated Unit School District 8 / 15,745 |
| 476. | 2.97 | Bunker Hill Community Unit School District 8 / 4,270 |
| 476. | 2.97 | Carterville Community Unit School District 5 / 11,309 |
| 476. | 2.97 | Kings Consolidated School District 144 / 1,007 |
| 476. | 2.97 | Delavan Community Unit School District 703 / 2,731 |
| 476. | 2.97 | East Dubuque Community Unit School District 119 / 4,534 |
| 476. | 2.97 | Athens Community Unit School District 213 / 5,658 |
| 500. | 2.96 | Belleville Township High School District 201 / 109,653 |
| 500. | 2.96 | St. Libory Consolidated School District 30 / 916 |
| 500. | 2.96 | Nashville Community High School District 99 / 8,925 |
| 500. | 2.96 | Vandalia Community Unit School District 203 / 11,623 |
| 500. | 2.96 | Maercker School District 60 / 17,295 |
| 500. | 2.96 | Bureau Valley Community Unit School District 340 / 6,788 |
| 500. | 2.96 | Palos Heights School District 128 / 10,275 |
| 500. | 2.96 | Sangamon Valley Community Unit School District 9 / 4,185 |
| 500. | 2.96 | Steward Elementary School District 220 / 626 |
| 500. | 2.96 | Midwest Central Community Unit School District 191 / 6,309 |
| 500. | 2.96 | West Northfield School District 31 / 9,824 |
| 511. | 2.95 | Hall High School District 502 / 9,533 |
| 511. | 2.95 | Tamaroa School District 5 / 889 |
| 511. | 2.95 | Ottawa Township High School District 140 / 31,796 |
| 511. | 2.95 | Willow Springs School District 108 / 3,982 |
| 511. | 2.95 | Sandoval Community Unit School District 501 / 2,638 |
| 511. | 2.95 | Pontiac Community Consolidated School District 429 / 13,716 |
| 511. | 2.95 | Norwood Elementary School District 63 / 4,143 |
| 511. | 2.95 | Jonesboro Community Consolidated School District 43 / 2,991 |
| 511. | 2.95 | Lexington Community Unit School District 7 / 3,014 |
| 511. | 2.95 | Mount Zion Community Unit School District 3 / 12,712 |
| 511. | 2.95 | Freeburg Community Consolidated School District 70 / 7,328 |
| 511. | 2.95 | Lena-Winslow Community Unit School District 202 / 5,301 |
| 511. | 2.95 | Gifford Community Consolidated School District 188 / 1,844 |
| 511. | 2.95 | Dongola School Unit District 66 / 1,907 |
| 511. | 2.95 | Nelson Public School District 8 / 358 |
| 511. | 2.95 | Dupo Community Unit School District 196 / 7,094 |
| 511. | 2.95 | Red Hill Community Unit School District 10 / 8,629 |
| 511. | 2.95 | Orion Community Unit School District 223 / 5,995 |
| 511. | 2.95 | Millstadt Consolidated Community School District 160 / 8,657 |
| 511. | 2.95 | Farrington Community Consolidated School District 99 / 610 |
| 511. | 2.95 | Morton Community Unit School District 709 / 19,002 |
| 511. | 2.95 | Effingham Community Unit School District 40 / 20,287 |
| 533. | 2.94 | Montmorency Community Consolidated School District 145 / 2,603 |
| 533. | 2.94 | Century Community Unit School District 100 / 2,760 |
| 533. | 2.94 | Moline Unit School District 40 / 48,693 |
| 533. | 2.94 | Windsor Community Unit School District 1 / 2,286 |
| 533. | 2.94 | Allen Township Community Consolidated School District 65 / 1,013 |
| 533. | 2.94 | Ottawa Elementary School District 141 / 19,601 |
| 533. | 2.94 | Hoyleton Consolidated School District 29 / 1,028 |
| 533. | 2.94 | West Richland Community Unit School District 2 / 2,250 |
| 533. | 2.94 | Joppa-Maple Grove Unit District 38 / 1,446 |
| 533. | 2.94 | Gibson City-Melvin-Sibley Community Unit School District 5 / 6,081 |
| 533. | 2.94 | Leepertown Community Consolidated School District 175 / 398 |
| 533. | 2.94 | Fisher Community Unit School District 1 / 3,246 |
| 533. | 2.94 | Rock Island School District 41 / 45,438 |
| 533. | 2.94 | Champaign Community Unit School District 4 / 93,268 |
| 533. | 2.94 | Riverton Community Unit School District 14 / 7,826 |
| 533. | 2.94 | Olympia Community Unit School District 16 / 12,153 |
| 533. | 2.94 | Rock Falls Township High School District 301 / 14,605 |
| 533. | 2.94 | Waltham Community Consolidated School District 185 / 2,489 |
| 533. | 2.94 | Wayne City Community Unit School District 100 / 3,667 |
| 533. | 2.94 | St. Anne Consolidated Community School District 256 / 2,947 |
| 533. | 2.94 | Red Bud Community Unit School District 132 / 7,584 |
| 533. | 2.94 | Oblong Community Unit School District 4 / 3,985 |
| 533. | 2.94 | Central School District 104 / 4,912 |
| 533. | 2.94 | Ball-Chatham Community Unit School District 5 / 26,649 |
| 533. | 2.94 | Bloomington School District 87 / 44,444 |
| 533. | 2.94 | Tri-Point Community Unit School District 6-J / 2,940 |
| 533. | 2.94 | Scott-Morgan Consolidated Unit School District 2 / 1,425 |
| 533. | 2.94 | Paxton-Buckley-Loda Community Unit School District 10 / 8,710 |
| 533. | 2.94 | East Alton-Wood River Community High School District 14 / 14,034 |
| 562. | 2.93 | Cypress School District 64 / 977 |
| 562. | 2.93 | Belleville School District 118 / 38,866 |
| 562. | 2.93 | Cornell Community Consolidated School District 426 / 1,087 |
| 562. | 2.93 | Limestone Walters Community Consolidated School District 316 / 1,877 |
| 562. | 2.93 | Odin School District 122 / 1,702 |
| 562. | 2.93 | United Township High School District 30 / 39,962 |
| 562. | 2.93 | Gillespie Community Unit School District 7 / 8,152 |
| 562. | 2.93 | Brownstown Community Unit School District 201 / 2,274 |
| 562. | 2.93 | Emmons School District 33 / 3,309 |
| 562. | 2.93 | Unity Point Community Consolidated School District 140 / 6,139 |
| 562. | 2.93 | Flanagan-Cornell District 74 in Cornell / 1,087 |
| 562. | 2.93 | Bond County Community Unit School District 2 / 13,592 |
| 562. | 2.93 | Egyptian Community Unit School District 5 / 3,878 |
| 562. | 2.93 | Alton Community Unit School District 11 / 49,134 |
| 562. | 2.93 | Salem Community High School District 600 / 15,204 |
| 562. | 2.93 | Catlin Community Unit School District 5 / 2,963 |
| 562. | 2.93 | New Athens Community Unit School District 60 / 3,983 |
| 562. | 2.93 | Virden Community Unit School District 4 / 5,096 |
| 562. | 2.93 | Pana Community Unit School District 8 / 9,590 |
| 562. | 2.93 | Georgetown-Ridge Farm Consolidated Unit School District 4 / 6,585 |
| 562. | 2.93 | Community Unit School District 4 / 4,314 |
| 562. | 2.93 | Ridgeview Community Unit School District 19 / 3,513 |
| 562. | 2.93 | Waltonville Community Unit School District 1 / 2,089 |
| 562. | 2.93 | Jamaica Community Unit School District 12 / 2,409 |
| 562. | 2.93 | Rome Community Consolidated School District 2 / 2,757 |
| 562. | 2.93 | North Wayne Community Unit School District 200 / 2,707 |
| 562. | 2.93 | Odin Community High School District 700 / 1,680 |
| 589. | 2.92 | North Clay Community Unit School District 25 / 3,867 |
| 589. | 2.92 | Prospect Heights School District 23 / 17,777 |
| 589. | 2.92 | Creve Coeur School District 76 / 6,256 |
| 589. | 2.92 | Greenfield Community Unit School District 10 / 2,759 |
| 589. | 2.92 | Grant Community Consolidated School District 110 / 7,972 |
| 589. | 2.92 | Monticello Community Unit School District 25 / 9,163 |
| 589. | 2.92 | LaSalle-Peru Township High School District 120 / 29,400 |
| 589. | 2.92 | Calhoun Community Unit School District 40 / 3,490 |
| 589. | 2.92 | Patoka Community Unit School District 100 / 1,566 |
| 589. | 2.92 | Oak Grove School District 68 / 3,956 |
| 589. | 2.92 | Erie Community Unit School District 1 / 3,731 |
| 589. | 2.92 | Carlyle Community Unit School District 1 / 10,196 |
| 589. | 2.92 | Salem School District 111 / 8,988 |
| 589. | 2.92 | Salt Creek School District 48 / 8,220 |
| 589. | 2.92 | Bismarck-Henning Consolidated Unit School District / 4,644 |
| 589. | 2.92 | Carrollton Community Unit School District 1 / 4,286 |
| 589. | 2.92 | Robein School District 85 / 1,976 |
| 589. | 2.92 | St. Elmo Community Unit School District 202 / 2,727 |
| 589. | 2.92 | Hamilton County Community Unit School District 10 / 7,974 |
| 589. | 2.92 | Zeigler-Royalton Community Unit School District 188 / 4,190 |
| 589. | 2.92 | Roxana Community Unit School District 1 / 11,947 |
| 589. | 2.92 | Quincy School District 172 / 51,038 |
| 611. | 2.91 | Central A & M Community Unit School District 21 / 4,778 |
| 611. | 2.91 | Lovington Community Unit School District 303 / 1,843 |
| 611. | 2.91 | District 50 Schools / 7,071 |
| 611. | 2.91 | Cerro Gordo Community Unit School District 100 / 3,206 |
| 611. | 2.91 | East Moline School District 37 / 26,789 |
| 611. | 2.91 | East Alton School District 13 / 7,974 |
| 611. | 2.91 | South Central Community Unit School District 401 / 4,443 |
| 611. | 2.91 | Crab Orchard Community Unit School District 3 / 2,290 |
| 611. | 2.91 | Tuscola Community Unit School District 301 / 5,782 |
| 611. | 2.91 | Griggsville-Perry Community Unit School District 4 / 2,456 |
| 611. | 2.91 | Argenta-Oreana Community Unit School District 1 / 4,127 |
| 611. | 2.91 | Waverly Community Unit School District 6 / 2,081 |
| 611. | 2.91 | Du Quoin Community Unit School District 300 / 9,353 |
| 611. | 2.91 | Chester Community Unit School District 139 / 11,160 |
| 611. | 2.91 | Dodds Community Consolidated School District 7 / 1,301 |
| 611. | 2.91 | Marissa Community Unit School District 40 / 3,363 |
| 611. | 2.91 | Ohio Community High School District 505 / 839 |
| 611. | 2.91 | Springfield School District 186 / 114,063 |
| 611. | 2.91 | Ladd Community Consolidated School District 94 / 1,588 |
| 611. | 2.91 | South Fork School District 14 / 2,438 |
| 611. | 2.91 | Ohio Community Consolidated School District 17 / 830 |
| 611. | 2.91 | Polo Community Unit School District 222 / 4,141 |
| 611. | 2.91 | Colona School District 190 / 3,974 |
| 611. | 2.91 | Mount Vernon Township High School District 201 / 29,760 |
| 611. | 2.91 | Mount Vernon School District 80 / 13,836 |
| 611. | 2.91 | Panhandle Community Unit School District 2 / 3,358 |
| 611. | 2.91 | Pontiac-William Holliday School District 105 / 8,126 |
| 611. | 2.91 | West Washington County Community Unit District 10 / 4,008 |
| 611. | 2.91 | Massac Unit School District 1 / 13,893 |
| 611. | 2.91 | Iroquois County Community Unit School District 9 / 7,151 |
| 611. | 2.91 | Vienna High School District 133 / 8,892 |
| 642. | 2.90 | Sparta Community Unit School District 140 / 8,927 |
| 642. | 2.90 | Westville Community Unit School District 2 / 7,171 |
| 642. | 2.90 | Staunton Community Unit School District 6 / 8,414 |
| 642. | 2.90 | Tri-City Community Unit School District 1 / 3,652 |
| 642. | 2.90 | South Wilmington Consolidated School District 74 / 888 |
| 642. | 2.90 | Cambridge Community Unit School District 227 / 3,006 |
| 642. | 2.90 | Wabash Community Unit School District 348 / 10,927 |
| 642. | 2.90 | Oglesby Elementary School District 125 / 4,800 |
| 642. | 2.90 | Dakota Community Unit School District 201 / 4,951 |
| 642. | 2.90 | Carrier Mills-Stonefort Community Unit School District / 2,862 |
| 642. | 2.90 | Community Consolidated School District 204 / 4,050 |
| 642. | 2.90 | Marshall Community Unit School District 2C / 8,125 |
| 642. | 2.90 | ROWVA Community Unit School District 208 / 3,879 |
| 642. | 2.90 | Mulberry Grove Community Unit School District 1 / 2,507 |
| 642. | 2.90 | Community Unit School District 16 / 5,744 |
| 642. | 2.90 | Illini Bluffs Community Unit School District 327 / 5,662 |
| 642. | 2.90 | Limestone Community High School District 310 / 22,774 |
| 642. | 2.90 | Jasper County Community Unit School District 1 / 9,346 |
| 642. | 2.90 | Woodlawn Community High School District 205 / 3,330 |
| 642. | 2.90 | Flora Community Unit School District 35 / 8,201 |
| 642. | 2.90 | Litchfield Community Unit School District 12 / 8,992 |
| 642. | 2.90 | Nokomis Community Unit School District 22 / 4,349 |
| 642. | 2.90 | Farmington Central Community Unit School District 265 / 8,217 |
| 665. | 2.89 | Illinois Valley Central Unit School District 321 / 13,545 |
| 665. | 2.89 | Shawnee Community Unit School District 84 / 2,818 |
| 665. | 2.89 | North Wamac School District 186 / 914 |
| 665. | 2.89 | Triopia Community Unit School District 27 / 2,307 |
| 665. | 2.89 | Hartsburg-Emden Community Unit School District 21 / 1,283 |
| 665. | 2.89 | Harrisburg Community Unit School District 3 / 12,796 |
| 665. | 2.89 | Central City School District 133 / 2,255 |
| 665. | 2.89 | Sherrard Community Unit School District 200 / 9,307 |
| 665. | 2.89 | Durand Community Unit School District 322 / 4,010 |
| 665. | 2.89 | Forrestville Valley Community Unit School District 221 / 5,146 |
| 665. | 2.89 | Stark County Community Unit School District 100 / 4,814 |
| 665. | 2.89 | Centralia School District 135 / 13,619 |
| 665. | 2.89 | Orangeville Community Unit School District 203 / 2,488 |
| 665. | 2.89 | Lebanon Community Unit School District 9 / 5,665 |
| 665. | 2.89 | Deer Park Community Consolidated School District 82 / 748 |
| 665. | 2.89 | Villa Grove Community Unit School District 302 / 4,047 |
| 665. | 2.89 | Frankfort Community Unit School District 168 / 11,980 |
| 665. | 2.89 | Bushnell-Prairie City Community Unit School District 170 / 4,432 |
| 665. | 2.89 | Spring Lake Community Consolidated School District 606 / 739 |
| 665. | 2.89 | Ina Community Consolidated School District 8 / 3,050 |
| 665. | 2.89 | Casey-Westfield Community Unit School District 4C / 6,073 |
| 665. | 2.89 | Anna Jonesboro Community High School District 81 / 11,297 |
| 665. | 2.89 | Blue Ridge Community Unit School District 18 / 5,184 |
| 665. | 2.89 | Thompsonville Community Unit School District 174 / 1,933 |
| 665. | 2.89 | Wallace Community Consolidated School District 195 / 2,756 |
| 665. | 2.89 | Pekin Community High School District 303 / 46,006 |
| 665. | 2.89 | New Simpson Hill Consolidated District 32 / 2,141 |
| 665. | 2.89 | Abingdon Community Unit School District 217 / 4,360 |
| 693. | 2.88 | Putnam County Community Unit School District 535 / 5,307 |
| 693. | 2.88 | Flanagan-Cornell District 74 / 1,689 |
| 693. | 2.88 | Hutsonville Community Unit School District 1 / 2,235 |
| 693. | 2.88 | Benton Consolidated High School District 103 / 12,652 |
| 693. | 2.88 | Harmony Emge School District 175 / 10,847 |
| 693. | 2.88 | Fox Lake Grade School District 114 / 8,929 |
| 693. | 2.88 | Geneseo Community Unit School District 228 / 16,118 |
| 693. | 2.88 | Dimmick Community Consolidated School District 175 / 1,012 |
| 693. | 2.88 | Giant City Community Consolidated School District 130 / 2,442 |
| 693. | 2.88 | Herrin Community Unit School District 4 / 16,524 |
| 693. | 2.88 | Freeport School District 145 / 30,679 |
| 693. | 2.88 | Brown County Community Unit School District 1 / 6,926 |
| 693. | 2.88 | Pinckneyville Community High School District 101 / 11,278 |
| 693. | 2.88 | Centralia High School District 200 / 21,619 |
| 693. | 2.88 | Woodlawn Community Consolidated School District 4 / 2,769 |
| 693. | 2.88 | Clinton Community Unit School District 15 / 12,087 |
| 693. | 2.88 | Selmaville Community Consolidated School District 10 / 1,883 |
| 693. | 2.88 | Warrensburg-Latham Community Unit District 11 / 6,447 |
| 693. | 2.88 | Warsaw Community Unit School District 316 / 2,653 |
| 693. | 2.88 | Virginia Community Unit School District 64 / 2,355 |
| 693. | 2.88 | Prairieview-Ogden Community Consolidated School District 197 / 2,432 |
| 693. | 2.88 | New Holland-Middletown Elementary School District 88 / 1,152 |
| 693. | 2.88 | Rooks Creek Community Consolidated School District 425 / 546 |
| 693. | 2.88 | Summersville School District 79 / 2,177 |
| 693. | 2.88 | Cumberland Community Unit School District 77 / 6,183 |
| 693. | 2.88 | Edwards County Community Unit School District 1 / 5,982 |
| 693. | 2.88 | Chadwick-Milledgeville Community Unit School District 399 / 3,021 |
| 693. | 2.88 | Anna Community Consolidated School District 37 / 7,074 |
| 693. | 2.88 | Vienna School District 55 / 5,081 |
| 722. | 2.87 | Pekin Public School District108 / 33,974 |
| 722. | 2.87 | Meridian Community Unit School District 15 / 6,197 |
| 722. | 2.87 | East Peoria Community High School District 309 / 26,387 |
| 722. | 2.87 | Forest Park School District 91 / 13,961 |
| 722. | 2.87 | Raccoon Consolidated School District 1 / 2,369 |
| 722. | 2.87 | Wethersfield Community Unit School District 230 / 3,989 |
| 722. | 2.87 | Winchester Community Unit School District 1 / 3,893 |
| 722. | 2.87 | Brussels Community Unit School District 42 / 1,337 |
| 722. | 2.87 | A-C Central Community Unit School District 262 / 2,604 |
| 722. | 2.87 | Peru Elementary School District 124 / 10,506 |
| 722. | 2.87 | Johnston City Community Unit School District 1 / 7,916 |
| 722. | 2.87 | Mattoon Community Unit School District 2 / 23,717 |
| 722. | 2.87 | Milford Township High School District 233 / 3,971 |
| 722. | 2.87 | High Mount School District 116 / 4,207 |
| 722. | 2.87 | Western Community Unit School District 12 / 3,652 |
| 722. | 2.87 | Oakwood Community Unit School District 76 / 6,252 |
| 722. | 2.87 | Bartonville School District 66 / 2,090 |
| 722. | 2.87 | Sullivan Community Unit School District 300 / 7,608 |
| 722. | 2.87 | Jasper Community Consolidated School District 17 / 1,483 |
| 722. | 2.87 | Spoon River Valley Community Unit School District 4 / 2,396 |
| 722. | 2.87 | Pleasant Hill Community Unit School District 3 / 1,771 |
| 722. | 2.87 | Robinson Community Unit School District 2 / 12,017 |
| 722. | 2.87 | Paris-Union School District 95 / 8,400 |
| 722. | 2.87 | East Richland Community Unit School District 1 / 14,052 |
| 722. | 2.87 | Milford Community Consolidated School District 280 / 3,971 |
| 722. | 2.87 | Taylorville Community Unit School District 3 / 18,866 |
| 748. | 2.86 | Gallatin Community Unit School District 7 / 5,268 |
| 748. | 2.86 | Mercer County School District 404 / 8,787 |
| 748. | 2.86 | Kansas Community Unit School District 3 / 1,420 |
| 748. | 2.86 | Illini Central Community Unit School District 189 / 4,872 |
| 748. | 2.86 | Carthage Elementary School District 317 / 4,250 |
| 748. | 2.86 | Pinckneyville School District 50 / 6,370 |
| 748. | 2.86 | Paris Community Unit School District 4 / 4,747 |
| 748. | 2.86 | Dalzell School District 98 / 765 |
| 748. | 2.86 | Charleston Community Unit School District 1 / 28,126 |
| 748. | 2.86 | Dixon Unit School District 170 / 23,163 |
| 748. | 2.86 | Galva Community Unit School District 224 / 3,570 |
| 748. | 2.86 | Pikeland Community Unit School District 10 / 8,636 |
| 748. | 2.86 | Decatur School District 61 / 72,085 |
| 748. | 2.86 | Franklin Community Unit School District 1 / 1,980 |
| 762. | 2.85 | Riverdale Community Unit School District 100 / 6,832 |
| 762. | 2.85 | Beecher City Community Unit School District 20 / 2,485 |
| 762. | 2.85 | Astoria Community Unit School District 1 / 2,102 |
| 762. | 2.85 | Benton Community Consolidated School District 47 / 10,170 |
| 762. | 2.85 | Alwood Community Unit School District 225 / 2,398 |
| 762. | 2.85 | East Coloma School District 12 / 2,582 |
| 762. | 2.85 | Carlinville Community Unit School District 1 / 9,460 |
| 762. | 2.85 | East Peoria School District 86 / 18,691 |
| 762. | 2.85 | Ashley Community Consolidated School District 15 / 2,041 |
| 762. | 2.85 | Willow Grove School District 46 / 2,053 |
| 762. | 2.85 | Pleasant Valley School District 62 / 4,763 |
| 762. | 2.85 | Jacksonville School District 117 / 28,404 |
| 762. | 2.85 | Carbondale Community High School District 165 / 37,519 |
| 762. | 2.85 | Rockridge Community Unit School District 300 / 7,392 |
| 762. | 2.85 | Morrison Community Unit School District 6 / 6,805 |
| 762. | 2.85 | Canton Union School District 66 / 18,091 |
| 762. | 2.85 | Hamilton Community Consolidated School District 328 / 4,038 |
| 779. | 2.84 | Princeton High School District 500 / 12,582 |
| 779. | 2.84 | Edinburg Community Unit School District 4 / 1,973 |
| 779. | 2.84 | Hillsboro Community Unit School District 3 / 13,496 |
| 779. | 2.84 | Lincoln Community High School District 404 / 22,341 |
| 779. | 2.84 | Riverview Consolidated Community School District 2 / 2,648 |
| 779. | 2.84 | Edgar County Community Unit District 6 / 2,338 |
| 779. | 2.84 | Mount Pulaski Community Unit District 23 / 3,642 |
| 779. | 2.84 | Eldorado Community Unit School District 4 / 7,232 |
| 779. | 2.84 | West Lincoln-Broadwell Elementary School District 92 / 4,833 |
| 779. | 2.84 | Sesser-Valier Community Unit School District 196 / 4,387 |
| 779. | 2.84 | Chester-East Lincoln Community Csd 61 / 3,217 |
| 779. | 2.84 | La Harpe Community School District 347 / 2,207 |
| 779. | 2.84 | Christopher Community Unit School District 99 / 4,594 |
| 779. | 2.84 | Lincoln Elementary School District 27 / 13,139 |
| 779. | 2.84 | Rankin Community School District 98 / 3,719 |
| 779. | 2.84 | Galesburg Community Unit School District 205 / 34,926 |
| 779. | 2.84 | Greenview Community Unit School District 200 / 1,517 |
| 779. | 2.84 | Marion Community Unit School District 2 / 27,551 |
| 779. | 2.84 | DeLand-Weldon Community Unit School District 57 / 1,431 |
| 779. | 2.84 | Shelbyville Community Unit School District 4 / 7,813 |
| 779. | 2.84 | Murphysboro Community Unit School District 186 / 15,612 |
| 779. | 2.84 | Henry-Senachwine Consolidated Unit School District 5 / 4,000 |
| 779. | 2.84 | Norris City-Omaha-Enfield Community Unit School District 3 / 4,472 |
| 802. | 2.83 | Oregon Community Unit School District 220 / 11,121 |
| 802. | 2.83 | United Community School District 304 / 6,125 |
| 802. | 2.83 | Knoxville Community Unit School District 202 / 6,269 |
| 802. | 2.83 | Warren Community Unit School District 205 / 2,749 |
| 802. | 2.83 | Field Community Consolidated School District 3 / 2,445 |
| 802. | 2.83 | Palestine Community Unit School District 3 / 2,370 |
| 802. | 2.83 | Steeleville Community Unit School District 138 / 3,097 |
| 802. | 2.83 | Fulton County Community Unit School District 3 / 3,447 |
| 802. | 2.83 | Armstrong Township High School District 225 / 1,421 |
| 802. | 2.83 | Urbana School District 116 / 51,198 |
| 802. | 2.83 | Havana Community Unit School District 126 / 6,627 |
| 802. | 2.83 | De Soto Consolidated School District 86 / 2,028 |
| 802. | 2.83 | Lick Creek Community Consolidated School District 16 / 1,232 |
| 802. | 2.83 | Schuyler-Industry Community Unit School District 5 / 8,005 |
| 802. | 2.83 | Princeton Elementary School District 115 / 11,843 |
| 817. | 2.82 | Illini West High School District 307 / 8,530 |
| 817. | 2.82 | Northwestern Community Unit School District 2 / 2,340 |
| 817. | 2.82 | Carbondale Elementary School District 95 / 26,910 |
| 817. | 2.82 | Girard Community Unit School District 3 / 3,823 |
| 817. | 2.82 | Lawrence County Community Unit District 20 / 8,313 |
| 822. | 2.81 | Coulterville Unit School District 1 / 1,566 |
| 822. | 2.81 | Midland Community Unit School District 7 / 5,415 |
| 822. | 2.81 | Okaw Valley Community Unit School District 302 / 3,420 |
| 822. | 2.81 | Mount Olive Community Unit School District 5 / 3,471 |
| 822. | 2.81 | V.I.T. Community Unit School District 2 / 2,259 |
| 822. | 2.81 | Porta Community Unit School District 202 / 7,122 |
| 822. | 2.81 | Grand Prairie Community Consolidated School District 6 / 885 |
| 822. | 2.81 | New Hope Community Consolidated School District 6 / 1,547 |
| 830. | 2.80 | Stockton Community Unit School District 206 / 3,901 |
| 830. | 2.80 | Lewistown Community Unit School District 97 / 5,032 |
| 830. | 2.80 | Irvington County Community Unit School District 11 / 846 |
| 830. | 2.80 | Richland School District 88A / 10,030 |
| 834. | 2.79 | Fairfield Community High School District 225 / 9,990 |
| 834. | 2.79 | Woodland Community Unit School District 5 / 3,124 |
| 834. | 2.79 | West Carroll Community Unit School District 314 / 8,701 |
| 834. | 2.79 | Neponset Community Consolidated District 307 / 820 |
| 834. | 2.79 | Hampton School District 29 / 2,142 |
| 839. | 2.78 | Cherry School District 92 / 612 |
| 839. | 2.78 | Galena Unit School District 120 / 6,050 |
| 839. | 2.78 | West Prairie Community Unit School District 103 / 4,858 |
| 839. | 2.78 | Oakland Community Unit School District 5 / 2,131 |
| 839. | 2.78 | Grayville Community Unit School District 1 / 2,080 |
| 839. | 2.78 | Peoria Heights Community Unit School District 325 / 6,744 |
| 839. | 2.78 | Hardin County Community Unit School District 1 / 4,328 |
| 846. | 2.77 | Eastland Community Unit School District 308 / 4,268 |
| 846. | 2.77 | Grass Lake School District 36 / 2,636 |
| 846. | 2.77 | Carmi-White County Community Unit School District 5 / 9,282 |
| 846. | 2.77 | Fairfield Public School District 112 / 6,116 |
| 846. | 2.77 | Monroe School District 70 / 3,194 |
| 846. | 2.77 | West Central Community Unit School District 235 / 6,207 |
| 846. | 2.77 | River Bend Community Unit District 2 / 6,638 |
| 853. | 2.76 | Macomb Community Unit School District 185 / 22,338 |
| 853. | 2.76 | Clay City Community Unit District 10 / 2,315 |
| 853. | 2.76 | Martinsville Community Unit School District 3C / 2,401 |
| 853. | 2.76 | Nauvoo-Colusa Community Unit School District 325 / 2,297 |
| 857. | 2.75 | Goreville Community Unit School District 1 / 3,748 |
| 857. | 2.75 | Riverdale School District 14 / 1,101 |
| 857. | 2.75 | Crescent Iroquois Community Unit School District 249 / 1,100 |
| 860. | 2.74 | Dallas Elementary School District 327 / 2,073 |
| 860. | 2.74 | Geff Community Consolidated School District 14 / 844 |
| 860. | 2.74 | McClellan Community Consolidated School District 12 / 815 |
| 863. | 2.73 | Avon Community Unit School District 176 / 1,728 |
| 863. | 2.73 | River Ridge Community Unit School District 210 / 3,724 |
| 863. | 2.73 | Armstrong-Ellis Consolidated School District 61 / 906 |
| 866. | 2.72 | Pope County Community Unit School District 1 / 4,470 |
| 867. | 2.71 | Shiloh Community Unit School District 1 / 2,803 |
| 867. | 2.71 | Williamsfield Community Unit School District 210 / 1,802 |
| 869. | 2.65 | Scales Mound Community Unit School District 211 / 1,668 |
| 870. | 2.56 | Flanagan-Cornell District 74 in Pontiac / 25 |
| 871. | 2.00 | Flanagan-Cornell District 74 in Rooks Creek / 2 |
Please note that we only rank locations with 'Average Family Size' data. The rank above might not be a complete list. Locations without 'Average Family Size' data are not listed.
