| Rank | Population Density ▼ | School District / Population |
| 1. | 10,839.8/sq mi | Philadelphia City School District / 1,546,920 |
| 2. | 10,639.3/sq mi | Upper Darby School District / 90,751 |
| 3. | 9,015.0/sq mi | William Penn School District / 42,189 |
| 4. | 8,684.5/sq mi | Reading School District / 88,051 |
| 5. | 8,203.3/sq mi | York City School District / 43,817 |
| 6. | 7,661.1/sq mi | Jenkintown School District / 4,441 |
| 7. | 7,192.6/sq mi | Northgate School District / 13,042 |
| 8. | 7,060.5/sq mi | Wilkinsburg Borough School District / 15,894 |
| 9. | 6,771.6/sq mi | Southeast Delco School District / 30,371 |
| 10. | 6,648.4/sq mi | Brentwood Borough School District / 9,625 |
| 11. | 6,590.4/sq mi | Allentown City School District / 118,793 |
| 12. | 5,785.6/sq mi | Lebanon School District / 26,383 |
| 13. | 5,669.8/sq mi | Lancaster School District / 75,450 |
| 14. | 5,441.0/sq mi | Mt. Lebanon School District / 33,085 |
| 15. | 5,370.7/sq mi | Pittsburgh School District / 309,436 |
| 16. | 5,203.7/sq mi | Bristol Borough School District / 9,657 |
| 17. | 5,117.1/sq mi | Ridley School District / 40,514 |
| 18. | 5,112.7/sq mi | Chester-Upland School District / 41,324 |
| 19. | 4,896.7/sq mi | Haverford Township School District / 48,698 |
| 20. | 4,760.6/sq mi | Keystone Oaks School District / 20,730 |
| 21. | 4,649.3/sq mi | Washington School District / 15,791 |
| 22. | 4,536.5/sq mi | Pottstown School District / 22,519 |
| 23. | 4,404.4/sq mi | Morrisville Borough School District / 8,689 |
| 24. | 4,316.6/sq mi | Carlynton School District / 14,336 |
| 25. | 4,294.6/sq mi | Columbia Borough School District / 10,399 |
| 26. | 4,155.2/sq mi | Harrisburg City School District / 49,297 |
| 27. | 4,138.1/sq mi | Hanover Public School District / 15,365 |
| 28. | 4,080.6/sq mi | Cheltenham Township School District / 36,912 |
| 29. | 4,036.0/sq mi | Norristown Area School District / 64,146 |
| 30. | 4,033.5/sq mi | Steel Valley School District / 16,310 |
| 31. | 4,031.0/sq mi | Jeannette City School District / 9,438 |
| 32. | 4,024.0/sq mi | Springfield School District / 26,946 |
| 33. | 3,742.7/sq mi | Riverview School District / 8,860 |
| 34. | 3,718.9/sq mi | Camp Hill School District / 7,891 |
| 35. | 3,672.8/sq mi | Sharon City School District / 13,845 |
| 36. | 3,664.6/sq mi | Abington School District / 58,112 |
| 37. | 3,640.8/sq mi | Sto-Rox School District / 12,439 |
| 38. | 3,637.7/sq mi | Wyomissing Area School District / 12,727 |
| 39. | 3,607.3/sq mi | Erie City School District / 100,844 |
| 40. | 3,588.9/sq mi | New Kensington-Arnold School District / 18,049 |
| 41. | 3,482.0/sq mi | Penn-Delco School District / 27,024 |
| 42. | 3,480.3/sq mi | Woodland Hills School District / 46,785 |
| 43. | 3,312.4/sq mi | Baldwin-Whitehall School District / 35,718 |
| 44. | 3,185.4/sq mi | Steelton-Highspire School District / 8,397 |
| 45. | 3,164.4/sq mi | Bristol Township School District / 54,431 |
| 46. | 3,086.2/sq mi | Wallingford-Swarthmore School District / 21,593 |
| 47. | 3,054.1/sq mi | Iroquois School District / 7,227 |
| 48. | 3,029.6/sq mi | Upper Moreland Township School District / 24,167 |
| 49. | 2,969.8/sq mi | Scranton School District / 75,842 |
| 50. | 2,887.1/sq mi | Bensalem Township School District / 60,404 |
| 51. | 2,872.3/sq mi | Springfield Township School District / 19,510 |
| 52. | 2,848.2/sq mi | Centennial School District / 48,903 |
| 53. | 2,811.5/sq mi | Bethel Park School District / 33,032 |
| 54. | 2,788.0/sq mi | Bethlehem Area School District / 117,254 |
| 55. | 2,740.2/sq mi | Wyoming Valley West School District / 41,934 |
| 56. | 2,730.4/sq mi | Duquesne City School District / 5,558 |
| 57. | 2,669.2/sq mi | Shaler Area School District / 39,247 |
| 58. | 2,564.7/sq mi | Lower Merion School District / 62,409 |
| 59. | 2,543.5/sq mi | Neshaminy School District / 71,034 |
| 60. | 2,523.2/sq mi | Monessen City School District / 7,630 |
| 61. | 2,445.0/sq mi | North Hills School District / 37,860 |
| 62. | 2,420.4/sq mi | Old Forge School District / 8,265 |
| 63. | 2,332.1/sq mi | North Penn School District / 99,658 |
| 64. | 2,282.4/sq mi | Radnor Township School District / 31,474 |
| 65. | 2,276.5/sq mi | Chichester School District / 24,515 |
| 66. | 2,240.8/sq mi | Whitehall-Coplay School District / 30,239 |
| 67. | 2,235.0/sq mi | Clairton City School District / 6,752 |
| 68. | 2,182.2/sq mi | Penn Hills School District / 42,367 |
| 69. | 2,150.3/sq mi | McKeesport Area School District / 31,240 |
| 70. | 2,109.7/sq mi | York Suburban School District / 21,654 |
| 71. | 2,087.3/sq mi | Interboro School District / 23,614 |
| 72. | 2,036.0/sq mi | Aliquippa School District / 9,356 |
| 73. | 2,033.2/sq mi | Easton Area School District / 64,301 |
| 74. | 1,964.5/sq mi | Upper Saint Clair School District / 19,303 |
| 75. | 1,963.9/sq mi | Upper Dublin School District / 26,042 |
| 76. | 1,926.8/sq mi | East Pennsboro Area School District / 20,620 |
| 77. | 1,850.8/sq mi | Muhlenberg School District / 23,687 |
| 78. | 1,839.9/sq mi | Millcreek Township School District / 53,902 |
| 79. | 1,825.1/sq mi | Upper Merion Area School District / 34,464 |
| 80. | 1,817.1/sq mi | Mechanicsburg Area School District / 29,093 |
| 81. | 1,803.8/sq mi | Lower Moreland Township School District / 13,133 |
| 82. | 1,801.0/sq mi | Hatboro-Horsham School District / 33,756 |
| 83. | 1,778.6/sq mi | Farrell Area School District / 5,716 |
| 84. | 1,771.5/sq mi | Cornell School District / 6,743 |
| 85. | 1,747.8/sq mi | Catasauqua Area School District / 11,022 |
| 86. | 1,739.5/sq mi | Marple Newtown School District / 35,845 |
| 87. | 1,731.4/sq mi | Colonial School District / 41,997 |
| 88. | 1,712.3/sq mi | New Castle Area School District / 23,998 |
| 89. | 1,629.6/sq mi | Pottsville Area School District / 19,939 |
| 90. | 1,610.9/sq mi | Manheim Township School District / 38,770 |
| 91. | 1,609.5/sq mi | Wissahickon School District / 37,045 |
| 92. | 1,609.2/sq mi | Chartiers Valley School District / 30,930 |
| 93. | 1,593.3/sq mi | Susquehanna Township School District / 24,332 |
| 94. | 1,570.5/sq mi | East Allegheny School District / 14,867 |
| 95. | 1,562.9/sq mi | Gateway School District / 31,648 |
| 96. | 1,553.6/sq mi | Dunmore School District / 13,974 |
| 97. | 1,500.9/sq mi | Phoenixville Area School District / 32,305 |
| 98. | 1,487.6/sq mi | West Chester Area School District / 110,007 |
| 99. | 1,477.3/sq mi | Pennsbury School District / 70,899 |
| 100. | 1,463.5/sq mi | Antietam School District / 7,628 |
| 101. | 1,455.4/sq mi | South Park School District / 13,492 |
| 102. | 1,452.4/sq mi | West Mifflin Area School District / 21,549 |
| 103. | 1,423.2/sq mi | Tredyffrin-Easttown School District / 40,017 |
| 104. | 1,386.7/sq mi | Pottsgrove School District / 21,413 |
| 105. | 1,364.5/sq mi | Rochester Area School District / 7,011 |
| 106. | 1,359.8/sq mi | Garnet Valley School District / 28,926 |
| 107. | 1,310.1/sq mi | Midland Borough School District / 2,608 |
| 108. | 1,296.7/sq mi | Central York School District / 37,736 |
| 109. | 1,251.4/sq mi | Norwin School District / 35,638 |
| 110. | 1,248.3/sq mi | South Allegheny School District / 11,805 |
| 111. | 1,244.3/sq mi | Perkiomen Valley School District / 38,720 |
| 112. | 1,229.6/sq mi | East Penn School District / 55,412 |
| 113. | 1,208.2/sq mi | Salisbury Township School District / 13,619 |
| 114. | 1,205.9/sq mi | Montour School District / 25,926 |
| 115. | 1,190.9/sq mi | Rose Tree Media School District / 35,453 |
| 116. | 1,145.0/sq mi | West York Area School District / 23,531 |
| 117. | 1,138.2/sq mi | Hampton Township School District / 18,444 |
| 118. | 1,138.0/sq mi | Spring-Ford Area School District / 48,387 |
| 119. | 1,124.7/sq mi | Methacton School District / 35,637 |
| 120. | 1,100.5/sq mi | North Allegheny School District / 51,144 |
| 121. | 1,094.3/sq mi | Peters Township School District / 21,587 |
| 122. | 1,082.0/sq mi | Exeter Township School District / 27,547 |
| 123. | 1,071.9/sq mi | Hempfield School District / 47,451 |
| 124. | 1,067.1/sq mi | Middletown Area School District / 18,382 |
| 125. | 1,056.2/sq mi | Wilson School District / 38,929 |
| 126. | 1,040.7/sq mi | Moon Area School District / 27,603 |
| 127. | 1,034.4/sq mi | Council Rock School District / 72,652 |
| 128. | 1,018.4/sq mi | Riverside School District / 11,942 |
| 129. | 1,010.5/sq mi | West Jefferson Hills School District / 19,911 |
| 130. | 1,002.6/sq mi | Mid Valley School District / 15,304 |
| 131. | 1,001.8/sq mi | Avonworth School District / 10,796 |
| 132. | 950.8/sq mi | Central Bucks School District / 115,083 |
| 133. | 945.6/sq mi | Plum Borough School District / 27,386 |
| 134. | 939.8/sq mi | Allegheny Valley School District / 9,753 |
| 135. | 932.2/sq mi | Greater Johnstown School District / 27,158 |
| 136. | 930.9/sq mi | Souderton Area School District / 45,992 |
| 137. | 929.2/sq mi | Ambridge Area School District / 23,778 |
| 138. | 904.4/sq mi | Derry Township School District / 24,779 |
| 139. | 903.7/sq mi | Highlands School District / 20,586 |
| 140. | 873.6/sq mi | Downingtown Area School District / 69,907 |
| 141. | 867.8/sq mi | New Brighton Area School District / 10,660 |
| 142. | 855.4/sq mi | Ferndale Area School District / 5,097 |
| 143. | 848.4/sq mi | West Shore School District / 63,079 |
| 144. | 845.0/sq mi | Coatesville Area School District / 64,066 |
| 145. | 844.9/sq mi | Altoona Area School District / 59,300 |
| 146. | 844.1/sq mi | Fox Chapel Area School District / 28,935 |
| 147. | 812.9/sq mi | Westmont Hilltop School District / 12,704 |
| 148. | 804.6/sq mi | Kennett Consolidated School District / 27,493 |
| 149. | 788.3/sq mi | Parkland School District / 56,803 |
| 150. | 781.1/sq mi | Warwick School District / 31,174 |
| 151. | 771.2/sq mi | Ephrata Area School District / 33,831 |
| 152. | 763.7/sq mi | Penn-Trafford School District / 25,983 |
| 153. | 750.5/sq mi | Governor Mifflin School District / 30,967 |
| 154. | 748.3/sq mi | Dallastown Area School District / 41,349 |
| 155. | 744.8/sq mi | Wilson Area School District / 15,447 |
| 156. | 738.8/sq mi | Pine-Richland School District / 23,352 |
| 157. | 738.4/sq mi | Center Valley School District / 18,221 |
| 158. | 730.7/sq mi | South Fayette Township School District / 14,898 |
| 159. | 719.5/sq mi | Central Dauphin School District / 91,628 |
| 160. | 708.5/sq mi | Pittston Area School District / 27,834 |
| 161. | 699.9/sq mi | Great Valley School District / 30,141 |
| 162. | 698.0/sq mi | Bryn Athyn School District / 1,348 |
| 163. | 696.9/sq mi | Hanover Area School District / 15,310 |
| 164. | 683.5/sq mi | Wyoming Area School District / 19,163 |
| 165. | 682.0/sq mi | Richland School District / 14,634 |
| 166. | 661.5/sq mi | Beaver Area School District / 14,854 |
| 167. | 658.4/sq mi | Valley View School District / 18,237 |
| 168. | 652.7/sq mi | Shenandoah Valley School District / 7,834 |
| 169. | 644.8/sq mi | Saucon Valley School District / 16,669 |
| 170. | 616.2/sq mi | State College Area School District / 93,124 |
| 171. | 615.3/sq mi | Palmyra Area School District / 22,806 |
| 172. | 611.9/sq mi | Franklin Regional School District / 23,215 |
| 173. | 611.8/sq mi | Canon-McMillan School District / 34,313 |
| 174. | 610.2/sq mi | Lampeter-Strasburg School District / 23,117 |
| 175. | 608.9/sq mi | Big Beaver Falls Area School District / 13,524 |
| 176. | 602.8/sq mi | Donegal School District / 21,531 |
| 177. | 599.5/sq mi | Hempfield Area School District / 50,219 |
| 178. | 597.0/sq mi | Conestoga Valley School District / 33,477 |
| 179. | 592.2/sq mi | Carbondale Area School District / 11,010 |
| 180. | 573.4/sq mi | Nazareth Area School District / 28,238 |
| 181. | 566.4/sq mi | Quaker Valley School District / 13,711 |
| 182. | 555.4/sq mi | Hermitage School District / 16,237 |
| 183. | 547.0/sq mi | Cumberland Valley School District / 56,311 |
| 184. | 545.9/sq mi | Neshannock Township School District / 9,511 |
| 185. | 541.7/sq mi | Elizabethtown Area School District / 30,446 |
| 186. | 528.0/sq mi | Pennridge School District / 48,827 |
| 187. | 527.8/sq mi | Mount Carmel Area School District / 12,448 |
| 188. | 527.8/sq mi | Cornwall-Lebanon School District / 35,180 |
| 189. | 522.0/sq mi | Burrell School District / 13,913 |
| 190. | 518.4/sq mi | Loyalsock Township School District / 11,144 |
| 191. | 511.4/sq mi | Wilkes-Barre Area School District / 59,661 |
| 192. | 508.2/sq mi | Harbor Creek School District / 17,336 |
| 193. | 501.5/sq mi | Quakertown Community School District / 36,274 |
| 194. | 501.2/sq mi | Northern Lehigh School District / 12,998 |
| 195. | 500.0/sq mi | Seneca Valley School District / 47,680 |
| 196. | 497.7/sq mi | Avon Grove School District / 31,219 |
| 197. | 489.7/sq mi | Greensburg Salem School District / 25,932 |
| 198. | 489.6/sq mi | Daniel Boone Area School District / 21,371 |
| 199. | 487.1/sq mi | Carlisle Area School District / 37,258 |
| 200. | 486.2/sq mi | South Western School District / 27,084 |
| 201. | 483.3/sq mi | Boyertown Area School District / 47,336 |
| 202. | 474.4/sq mi | Northeastern York School District / 23,951 |
| 203. | 474.1/sq mi | Southern Lehigh School District / 21,459 |
| 204. | 470.3/sq mi | Ringgold School District / 26,000 |
| 205. | 464.5/sq mi | Stroudsburg Area School District / 34,203 |
| 206. | 461.9/sq mi | Union Area School District / 5,521 |
| 207. | 458.1/sq mi | Cocalico School District / 23,293 |
| 208. | 455.1/sq mi | Lewisburg Area School District / 18,978 |
| 209. | 455.1/sq mi | Charleroi School District / 11,862 |
| 210. | 448.5/sq mi | Pen Argyl Area School District / 12,441 |
| 211. | 444.2/sq mi | Greater Latrobe School District / 31,099 |
| 212. | 442.3/sq mi | Upper Perkiomen School District / 22,692 |
| 213. | 431.1/sq mi | Dallas School District / 20,755 |
| 214. | 430.4/sq mi | Northampton Area School District / 41,804 |
| 215. | 427.4/sq mi | Belle Vernon Area School District / 18,731 |
| 216. | 425.6/sq mi | Fleetwood Area School District / 16,786 |
| 217. | 422.9/sq mi | Mars Area School District / 19,603 |
| 218. | 417.4/sq mi | Laurel Highlands School District / 23,300 |
| 219. | 415.3/sq mi | Elizabeth Forward School District / 18,063 |
| 220. | 410.7/sq mi | Williamsport Area School District / 41,849 |
| 221. | 402.4/sq mi | Indiana Area School District / 33,154 |
| 222. | 392.0/sq mi | New Hope-Solebury School District / 11,200 |
| 223. | 377.6/sq mi | Butler Area School District / 54,465 |
| 224. | 374.3/sq mi | Greenville Area School District / 10,661 |
| 225. | 369.9/sq mi | Penn Manor School District / 41,932 |
| 226. | 365.7/sq mi | Dover Area School District / 25,731 |
| 227. | 365.7/sq mi | Conewago Valley School District / 27,468 |
| 228. | 364.4/sq mi | Chartiers-Houston School District / 9,118 |
| 229. | 363.4/sq mi | Panther Valley School District / 12,488 |
| 230. | 361.3/sq mi | Southmoreland School District / 15,221 |
| 231. | 360.2/sq mi | Eastern York School District / 19,829 |
| 232. | 359.8/sq mi | Ellwood City Area School District / 13,945 |
| 233. | 358.1/sq mi | West Allegheny School District / 20,749 |
| 234. | 350.6/sq mi | Deer Lakes School District / 14,285 |
| 235. | 350.3/sq mi | Waynesboro Area School District / 32,612 |
| 236. | 349.4/sq mi | Greater Nanticoke Area School District / 18,916 |
| 237. | 349.3/sq mi | Fairview School District / 10,187 |
| 238. | 342.8/sq mi | Schuylkill Haven Area School District / 8,203 |
| 239. | 336.2/sq mi | Owen J. Roberts School District / 33,212 |
| 240. | 335.5/sq mi | Eastern Lancaster County School District / 32,609 |
| 241. | 330.3/sq mi | Abington Heights School District / 23,300 |
| 242. | 324.0/sq mi | Conrad Weiser Area School District / 19,346 |
| 243. | 323.4/sq mi | Shenango Area School District / 8,016 |
| 244. | 322.6/sq mi | Freedom Area School District / 11,255 |
| 245. | 319.9/sq mi | Leechburg Area School District / 5,958 |
| 246. | 319.5/sq mi | California Area School District / 11,047 |
| 247. | 317.5/sq mi | Oxford Area School District / 25,867 |
| 248. | 314.1/sq mi | Manheim Central School District / 24,778 |
| 249. | 313.9/sq mi | Annville-Cleona School District / 12,310 |
| 250. | 312.0/sq mi | Unionville-Chadds Ford School District / 24,011 |
| 251. | 310.5/sq mi | Girard School District / 11,154 |
| 252. | 305.8/sq mi | Southern York County School District / 20,748 |
| 253. | 302.8/sq mi | South Middleton School District / 14,864 |
| 254. | 302.1/sq mi | Conemaugh Valley School District / 6,517 |
| 255. | 301.3/sq mi | Littlestown Area School District / 14,821 |
| 256. | 300.7/sq mi | Hopewell Area School District / 17,995 |
| 257. | 300.6/sq mi | Spring Grove Area School District / 27,906 |
| 258. | 298.6/sq mi | Eastern Lebanon County School District / 21,219 |
| 259. | 296.6/sq mi | Shamokin Area School District / 20,929 |
| 260. | 292.0/sq mi | Shikellamy School District / 22,676 |
| 261. | 289.7/sq mi | Hazleton Area School District / 72,932 |
| 262. | 289.6/sq mi | Trinity Area School District / 26,103 |
| 263. | 289.2/sq mi | Schuylkill Valley School District / 15,031 |
| 264. | 288.7/sq mi | Pleasant Valley School District / 33,533 |
| 265. | 287.7/sq mi | Sharpsville Area School District / 7,651 |
| 266. | 275.9/sq mi | Kiski Area School District / 28,959 |
| 267. | 272.8/sq mi | Red Lion Area School District / 38,485 |
| 268. | 271.4/sq mi | Twin Valley School District / 24,180 |
| 269. | 270.8/sq mi | Lehighton Area School District / 17,797 |
| 270. | 270.5/sq mi | Chambersburg Area School District / 67,434 |
| 271. | 267.4/sq mi | Pequea Valley School District / 21,736 |
| 272. | 266.5/sq mi | Greencastle-Antrim School District / 19,158 |
| 273. | 265.5/sq mi | Bangor Area School District / 23,150 |
| 274. | 264.7/sq mi | Palmerton Area School District / 14,173 |
| 275. | 264.6/sq mi | Brownsville Area School District / 14,990 |
| 276. | 261.2/sq mi | South Williamsport Area School District / 9,278 |
| 277. | 259.2/sq mi | Lower Dauphin School District / 25,040 |
| 278. | 254.7/sq mi | Blackhawk School District / 18,030 |
| 279. | 254.0/sq mi | Northern York County School District / 21,450 |
| 280. | 252.9/sq mi | Brandywine Heights Area School District / 13,191 |
| 281. | 250.0/sq mi | Portage Area School District / 6,293 |
| 282. | 246.9/sq mi | Berwick Area School District / 22,494 |
| 283. | 243.7/sq mi | Bloomsburg Area School District / 20,629 |
| 284. | 243.2/sq mi | North East School District / 10,623 |
| 285. | 238.9/sq mi | Sayre Area School District / 7,961 |
| 286. | 234.6/sq mi | Shippensburg Area School District / 28,719 |
| 287. | 231.6/sq mi | North Schuylkill School District / 16,690 |
| 288. | 229.4/sq mi | Bellefonte Area School District / 26,787 |
| 289. | 227.3/sq mi | Mahanoy Area School District / 11,560 |
| 290. | 225.7/sq mi | Octorara Area School District / 18,010 |
| 291. | 224.1/sq mi | Hollidaysburg Area School District / 27,261 |
| 292. | 219.4/sq mi | Freeport Area School District / 11,725 |
| 293. | 219.4/sq mi | East Stroudsburg Area School District / 47,564 |
| 294. | 217.5/sq mi | Selinsgrove Area School District / 22,800 |
| 295. | 212.6/sq mi | Riverside Beaver County School District / 10,503 |
| 296. | 211.8/sq mi | Yough School District / 15,941 |
| 297. | 209.1/sq mi | Millersburg Area School District / 6,692 |
| 298. | 208.3/sq mi | Oley Valley School District / 13,341 |
| 299. | 200.8/sq mi | Grove City Area School District / 17,633 |
| 300. | 199.2/sq mi | Pocono Mountain School District / 64,049 |
| 301. | 194.4/sq mi | Milton Area School District / 16,769 |
| 302. | 193.9/sq mi | Muncy School District / 7,206 |
| 303. | 193.5/sq mi | Crawford Central School District / 30,636 |
| 304. | 191.6/sq mi | South Butler County School District / 18,349 |
| 305. | 190.7/sq mi | Central Columbia School District / 15,000 |
| 306. | 188.5/sq mi | Kutztown Area School District / 18,660 |
| 307. | 187.5/sq mi | Crestwood School District / 20,240 |
| 308. | 186.6/sq mi | Oil City Area School District / 14,916 |
| 309. | 185.8/sq mi | Lakeland School District / 12,327 |
| 310. | 180.4/sq mi | Derry Area School District / 17,663 |
| 311. | 180.2/sq mi | South Eastern School District / 19,604 |
| 312. | 177.2/sq mi | Carmichaels Area School District / 6,923 |
| 313. | 172.1/sq mi | Solanco School District / 32,403 |
| 314. | 171.7/sq mi | Bermudian Springs School District / 12,920 |
| 315. | 169.3/sq mi | Hamburg Area School District / 17,625 |
| 316. | 168.9/sq mi | Blue Mountain School District / 20,811 |
| 317. | 165.4/sq mi | Albert Gallatin Area School District / 23,436 |
| 318. | 164.6/sq mi | Mount Pleasant Area School District / 17,544 |
| 319. | 160.7/sq mi | Susquenita School District / 14,738 |
| 320. | 159.9/sq mi | Bethlehem-Center School District / 8,845 |
| 321. | 157.8/sq mi | Western Beaver County School District / 5,488 |
| 322. | 157.8/sq mi | Somerset Area School District / 21,244 |
| 323. | 157.3/sq mi | Connellsville Area School District / 34,144 |
| 324. | 156.4/sq mi | Minersville Area School District / 8,673 |
| 325. | 156.0/sq mi | Gettysburg Area School District / 27,591 |
| 326. | 154.8/sq mi | Homer-Center School District / 6,372 |
| 327. | 154.6/sq mi | Blacklick Valley School District / 5,186 |
| 328. | 153.1/sq mi | Warrior Run School District / 17,447 |
| 329. | 152.1/sq mi | General McLane School District / 17,381 |
| 330. | 151.5/sq mi | Danville Area School District / 18,983 |
| 331. | 150.8/sq mi | Conemaugh Township Area School District / 8,226 |
| 332. | 150.3/sq mi | Penn Cambria School District / 16,496 |
| 333. | 149.2/sq mi | Slippery Rock Area School District / 20,830 |
| 334. | 147.6/sq mi | Palisades School District / 14,904 |
| 335. | 147.2/sq mi | Windber Area School District / 8,478 |
| 336. | 147.1/sq mi | Delaware Valley School District / 28,859 |
| 337. | 145.4/sq mi | Spring Cove School District / 14,266 |
| 338. | 145.1/sq mi | Fort Cherry School District / 8,391 |
| 339. | 143.1/sq mi | Saint Clair Area School District / 6,797 |
| 340. | 142.3/sq mi | West Middlesex Area School District / 7,406 |
| 341. | 140.7/sq mi | Bentworth School District / 8,314 |
| 342. | 139.5/sq mi | Northwestern Lehigh School District / 14,952 |
| 343. | 137.5/sq mi | Frazier School District / 8,177 |
| 344. | 136.6/sq mi | Central Cambria School District / 13,649 |
| 345. | 135.2/sq mi | Jim Thorpe Area School District / 15,770 |
| 346. | 135.0/sq mi | Tamaqua Area School District / 16,588 |
| 347. | 134.5/sq mi | Bellwood-Antis School District / 8,273 |
| 348. | 130.5/sq mi | Fairfield Area School District / 8,045 |
| 349. | 130.1/sq mi | Fort LeBoeuf School District / 14,365 |
| 350. | 129.4/sq mi | Forest Hills School District / 12,448 |
| 351. | 128.0/sq mi | Upper Adams School District / 10,721 |
| 352. | 126.9/sq mi | Blairsville-Saltsburg School District / 14,070 |
| 353. | 126.1/sq mi | Jefferson-Morgan School District / 6,002 |
| 354. | 123.9/sq mi | Clarion Area School District / 8,643 |
| 355. | 123.5/sq mi | Laurel School District / 8,189 |
| 356. | 122.9/sq mi | Apollo-Ridge School District / 9,439 |
| 357. | 121.4/sq mi | Northern Cambria School District / 7,581 |
| 358. | 120.1/sq mi | Northern Lebanon School District / 17,286 |
| 359. | 119.9/sq mi | DuBois Area School District / 30,964 |
| 360. | 119.8/sq mi | Mercer Area School District / 10,584 |
| 361. | 119.5/sq mi | Mifflin County School District / 43,593 |
| 362. | 119.0/sq mi | Lake-Lehman School District / 16,905 |
| 363. | 118.8/sq mi | Tulpehocken Area School District / 12,041 |
| 364. | 117.4/sq mi | Lackawanna Trail School District / 8,620 |
| 365. | 116.5/sq mi | Wilmington Area School District / 11,583 |
| 366. | 112.9/sq mi | Western Wayne School District / 19,070 |
| 367. | 112.2/sq mi | Pine Grove Area School District / 11,692 |
| 368. | 111.4/sq mi | Williams Valley School District / 6,865 |
| 369. | 109.3/sq mi | North Pocono School District / 20,983 |
| 370. | 107.3/sq mi | Big Spring School District / 20,937 |
| 371. | 107.2/sq mi | Reynolds School District / 9,436 |
| 372. | 106.8/sq mi | Upper Dauphin Area School District / 9,604 |
| 373. | 104.4/sq mi | Mohawk Area School District / 10,748 |
| 374. | 104.3/sq mi | Valley Grove School District / 6,667 |
| 375. | 104.0/sq mi | Newport School District / 7,441 |
| 376. | 103.6/sq mi | Claysburg-Kimmel School District / 5,845 |
| 377. | 99.5/sq mi | Northwestern School District / 12,071 |
| 378. | 96.2/sq mi | Armstrong School District / 42,724 |
| 379. | 93.7/sq mi | Central Greene School District / 15,902 |
| 380. | 93.2/sq mi | Burgettstown Area School District / 9,814 |
| 381. | 92.9/sq mi | Moshannon Valley School District / 8,812 |
| 382. | 92.6/sq mi | Uniontown Area School District / 23,111 |
| 383. | 92.3/sq mi | Southern Columbia Area School District / 10,154 |
| 384. | 91.7/sq mi | Halifax Area School District / 7,893 |
| 385. | 88.6/sq mi | Tuscarora School District / 18,300 |
| 386. | 88.3/sq mi | Union City Area School District / 6,778 |
| 387. | 88.2/sq mi | Cambria Heights School District / 9,801 |
| 388. | 88.0/sq mi | Montgomery Area School District / 7,596 |
| 389. | 87.8/sq mi | South Side Area School District / 6,637 |
| 390. | 86.9/sq mi | Franklin Area School District / 16,320 |
| 391. | 85.9/sq mi | North Star School District / 8,970 |
| 392. | 82.2/sq mi | Bradford Area School District / 20,833 |
| 393. | 81.0/sq mi | Karns City Area School District / 10,636 |
| 394. | 80.0/sq mi | Athens Area School District / 14,643 |
| 395. | 76.8/sq mi | Mifflinburg Area School District / 16,479 |
| 396. | 76.7/sq mi | Wallenpaupack Area School District / 25,123 |
| 397. | 76.6/sq mi | Punxsutawney Area School District / 21,001 |
| 398. | 75.9/sq mi | Northwest Area School District / 9,062 |
| 399. | 75.5/sq mi | Midd-West School District / 17,122 |
| 400. | 75.4/sq mi | Tyrone Area School District / 12,597 |
| 401. | 74.4/sq mi | Huntingdon Area School District / 20,442 |
| 402. | 72.4/sq mi | Titusville Area School District / 14,484 |
| 403. | 71.9/sq mi | Wattsburg Area School District / 10,352 |
| 404. | 71.8/sq mi | Penns Manor Area School District / 5,825 |
| 405. | 70.2/sq mi | East Lycoming School District / 10,335 |
| 406. | 70.0/sq mi | Jamestown Area School District / 4,313 |
| 407. | 69.8/sq mi | Montoursville Area School District / 13,152 |
| 408. | 69.7/sq mi | Blue Ridge School District / 7,700 |
| 409. | 68.8/sq mi | Philipsburg-Osceola Area School District / 15,462 |
| 410. | 68.3/sq mi | Ligonier Valley School District / 15,767 |
| 411. | 68.2/sq mi | Clarion-Limestone Area School District / 8,000 |
| 412. | 68.0/sq mi | Corry Area School District / 14,339 |
| 413. | 66.8/sq mi | Southeastern Greene School District / 4,574 |
| 414. | 66.6/sq mi | Mount Union Area School District / 9,963 |
| 415. | 66.5/sq mi | Towanda Area School District / 10,808 |
| 416. | 66.1/sq mi | Tri-Valley School District / 6,555 |
| 417. | 65.0/sq mi | McGuffey School District / 12,899 |
| 418. | 64.5/sq mi | Juniata County School District / 24,112 |
| 419. | 64.4/sq mi | Tunkhannock Area School District / 19,156 |
| 420. | 63.9/sq mi | Forest City Regional School District / 6,174 |
| 421. | 62.8/sq mi | Curwensville Area School District / 7,326 |
| 422. | 62.5/sq mi | Moniteau School District / 9,422 |
| 423. | 61.3/sq mi | Millville Area School District / 5,593 |
| 424. | 61.2/sq mi | Northern Bedford County School District / 6,817 |
| 425. | 60.9/sq mi | Keystone School District / 7,503 |
| 426. | 60.8/sq mi | Williamsburg Community School District / 3,863 |
| 427. | 60.5/sq mi | United School District / 8,006 |
| 428. | 60.4/sq mi | West Perry School District / 18,972 |
| 429. | 59.5/sq mi | Penncrest School District / 24,263 |
| 430. | 58.8/sq mi | Cranberry Area School District / 9,215 |
| 431. | 58.4/sq mi | Glendale School District / 5,765 |
| 432. | 57.5/sq mi | Lakeview School District / 8,285 |
| 433. | 57.4/sq mi | Brockway Area School District / 7,486 |
| 434. | 57.2/sq mi | Bedford Area School District / 16,657 |
| 435. | 57.2/sq mi | Avella Area School District / 4,251 |
| 436. | 56.8/sq mi | Conneaut School District / 18,110 |
| 437. | 56.5/sq mi | Greenwood School District / 5,484 |
| 438. | 56.1/sq mi | Meyersdale Area School District / 6,892 |
| 439. | 55.9/sq mi | Union School District / 4,300 |
| 440. | 55.9/sq mi | St. Marys Area School District / 19,105 |
| 441. | 55.7/sq mi | Line Mountain School District / 8,681 |
| 442. | 55.6/sq mi | Commodore Perry School District / 4,133 |
| 443. | 55.3/sq mi | Clearfield Area School District / 19,219 |
| 444. | 53.9/sq mi | Shade-Central City School District / 3,732 |
| 445. | 53.4/sq mi | Central Fulton School District / 6,432 |
| 446. | 52.9/sq mi | Benton Area School District / 5,138 |
| 447. | 52.8/sq mi | Marion Center Area School District / 10,162 |
| 448. | 52.6/sq mi | Montrose Area School District / 11,985 |
| 449. | 51.3/sq mi | Salisbury-Elk Lick School District / 2,975 |
| 450. | 51.1/sq mi | Penns Valley Area School District / 13,087 |
| 451. | 49.9/sq mi | Susquehanna Community School District / 5,151 |
| 452. | 49.4/sq mi | Redbank Valley School District / 8,253 |
| 453. | 49.0/sq mi | Warren County School District / 38,016 |
| 454. | 48.9/sq mi | Purchase Line School District / 7,124 |
| 455. | 48.2/sq mi | Wayne Highlands School District / 20,514 |
| 456. | 47.6/sq mi | Otto-Eldred School District / 4,171 |
| 457. | 47.2/sq mi | Jersey Shore Area School District / 18,494 |
| 458. | 46.6/sq mi | Chestnut Ridge School District / 10,464 |
| 459. | 46.4/sq mi | Weatherly Area School District / 4,989 |
| 460. | 45.7/sq mi | West Branch Area School District / 7,557 |
| 461. | 45.6/sq mi | Allegheny-Clarion Valley School District / 5,719 |
| 462. | 45.1/sq mi | Brookville Area School District / 11,861 |
| 463. | 44.4/sq mi | Mountain View School District / 8,565 |
| 464. | 43.9/sq mi | Shanksville-Stonycreek School District / 2,903 |
| 465. | 43.5/sq mi | North Clarion County School District / 4,882 |
| 466. | 43.0/sq mi | Northern Tioga School District / 14,217 |
| 467. | 42.7/sq mi | Tussey Mountain School District / 7,388 |
| 468. | 40.1/sq mi | Elk Lake School District / 7,826 |
| 469. | 39.1/sq mi | Juniata Valley School District / 5,278 |
| 470. | 38.9/sq mi | Troy Area School District / 10,767 |
| 471. | 38.8/sq mi | Bald Eagle Area School District / 13,242 |
| 472. | 38.6/sq mi | Rockwood Area School District / 5,651 |
| 473. | 38.4/sq mi | Keystone Central School District / 37,299 |
| 474. | 37.4/sq mi | Fannett-Metal School District / 4,556 |
| 475. | 36.3/sq mi | Ridgway Area School District / 6,679 |
| 476. | 36.2/sq mi | Wellsboro Area School District / 11,983 |
| 477. | 34.9/sq mi | Berlin Brothersvalley School District / 5,764 |
| 478. | 34.9/sq mi | Southern Huntingdon County School District / 7,724 |
| 479. | 34.7/sq mi | Northeast Bradford School District / 5,787 |
| 480. | 33.8/sq mi | Port Allegany School District / 5,768 |
| 481. | 33.1/sq mi | Southern Tioga School District / 16,153 |
| 482. | 32.8/sq mi | Everett Area School District / 9,639 |
| 483. | 32.0/sq mi | Canton Area School District / 6,774 |
| 484. | 31.4/sq mi | Wyalusing Area School District / 8,698 |
| 485. | 30.0/sq mi | Kane Area School District / 7,351 |
| 486. | 29.1/sq mi | Turkeyfoot Valley Area School District / 2,984 |
| 487. | 27.2/sq mi | Harmony Area School District / 2,272 |
| 488. | 26.8/sq mi | Forbes Road School District / 2,869 |
| 489. | 26.6/sq mi | Coudersport Area School District / 5,629 |
| 490. | 26.4/sq mi | Johnsonburg Area School District / 4,405 |
| 491. | 25.9/sq mi | Southern Fulton School District / 5,446 |
| 492. | 25.1/sq mi | Oswayo Valley School District / 3,079 |
| 493. | 21.0/sq mi | Northern Potter School District / 4,796 |
| 494. | 18.9/sq mi | West Greene School District / 4,770 |
| 495. | 17.7/sq mi | Smethport Area School District / 6,014 |
| 496. | 16.1/sq mi | Forest Area School District / 8,093 |
| 497. | 14.1/sq mi | Sullivan County School District / 6,400 |
| 498. | 12.4/sq mi | Cameron County School District / 4,939 |
| 499. | 9.2/sq mi | Galeton Area School District / 2,913 |
| 500. | 5.0/sq mi | Austin Area School District / 1,127 |
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.
