| Rank | House Built in 1959 or Earlier Percentage ▼ | School District / Population |
| 1. | 100.0% | Flanagan-Cornell District 74 in Rooks Creek / 3 |
| 2. | 88.6% | Cicero School District 99 / 83,924 |
| 3. | 88.5% | Berwyn North School District 98 / 25,179 |
| 4. | 87.7% | Brookfield School District 95 / 10,951 |
| 5. | 86.4% | Kenilworth School District 38 / 3,114 |
| 6. | 85.7% | Flanagan-Cornell District 74 in Pontiac / 54 |
| 7. | 84.5% | Bartonville School District 66 / 2,115 |
| 8. | 84.4% | J. Sterling Morton High School District 201 / 158,414 |
| 9. | 84.4% | Berwyn South School District 100 / 31,197 |
| 10. | 82.8% | Riverside Brookfield Township School District 208 / 29,140 |
| 11. | 82.6% | Lindop School District 92 / 4,065 |
| 12. | 80.9% | Riverside School District 96 / 13,631 |
| 13. | 80.9% | Wood River-Hartford Elementary School District 15 / 6,300 |
| 14. | 80.7% | Cherry School District 92 / 440 |
| 15. | 79.8% | River Forest School District 90 / 11,174 |
| 16. | 79.0% | Komarek School District 94 / 5,117 |
| 17. | 78.9% | Oak Park and River Forest District 200 / 62,955 |
| 18. | 78.8% | Oak Park Elementary School District 97 / 51,781 |
| 19. | 78.6% | Maywood-Melrose Park-Broadview School District 89 / 44,548 |
| 20. | 77.8% | Kewanee Community Unit School District 229 / 11,012 |
| 21. | 77.2% | LaSalle Elementary School District 122 / 9,092 |
| 22. | 75.7% | Evergreen Park Community High School District 231 / 19,852 |
| 22. | 75.7% | Evergreen Park Elementary School District 124 / 19,852 |
| 24. | 75.5% | East Prairie School District 73 / 4,203 |
| 25. | 74.9% | Franklin Park School District 84 / 11,391 |
| 26. | 72.7% | Park Forest School District 163 / 15,603 |
| 27. | 72.7% | East Alton-Wood River Community High School District 14 / 13,703 |
| 28. | 71.8% | Summit School District 104 / 12,459 |
| 29. | 71.6% | Winnetka School District 36 / 11,724 |
| 30. | 71.6% | Skokie School District 73-5 / 10,341 |
| 31. | 70.9% | Depue Community Unit School District 103 / 2,056 |
| 32. | 70.0% | Elmwood Park Community Unit School District 401 / 24,876 |
| 33. | 69.3% | Evanston Township High School District 202 / 82,936 |
| 33. | 69.3% | Evanston Community Consolidated School District 65 / 82,936 |
| 35. | 69.3% | Wilmette School District 39 / 25,592 |
| 36. | 69.1% | Westchester School District 92-5 / 16,134 |
| 37. | 68.9% | Bureau Valley Community Unit School District 340 / 7,090 |
| 38. | 68.8% | Bradford Community Unit School District 1 / 1,901 |
| 39. | 68.6% | Hartsburg-Emden Community Unit School District 21 / 1,003 |
| 40. | 68.3% | Lostant Community Unit School District 425 / 851 |
| 41. | 68.1% | La Moille Community Unit School District 303 / 1,852 |
| 42. | 68.1% | Mannheim School District 83 / 21,198 |
| 43. | 68.0% | Glencoe School District 35 / 8,629 |
| 44. | 67.7% | Bellwood School District 88 / 23,258 |
| 45. | 67.7% | Monmouth-Roseville Community Unit School District 238 / 11,394 |
| 46. | 67.3% | Chicago Public School District 299 / 2,702,420 |
| 47. | 67.3% | Proviso Township High School District 209 / 126,620 |
| 48. | 66.9% | Streator Elementary School District 44 / 16,883 |
| 49. | 66.8% | Malden Community Consolidated School District 84 / 950 |
| 50. | 66.7% | East Alton School District 13 / 7,403 |
| 51. | 66.6% | Shiloh Community Unit School District 1 / 2,926 |
| 52. | 66.5% | Spoon River Valley Community Unit School District 4 / 2,471 |
| 53. | 66.5% | LaGrange School District 102 / 25,131 |
| 54. | 66.4% | Madison Community Unit School District 12 / 4,913 |
| 55. | 66.4% | New Trier Township High School District 203 / 59,899 |
| 56. | 66.2% | Flanagan-Cornell District 74 / 1,723 |
| 57. | 66.1% | Pleasant Hill School District 69 / 1,997 |
| 58. | 66.1% | Signal Hill School District 181 / 3,566 |
| 59. | 66.0% | New Holland-Middletown Elementary School District 88 / 989 |
| 60. | 65.8% | Western Springs School District 101 / 10,047 |
| 61. | 65.6% | Streator Township High School District 40 / 18,491 |
| 62. | 65.5% | Southeastern Community Unit School District 337 / 3,227 |
| 63. | 65.5% | Odell Community Consolidated School District 435 / 1,424 |
| 64. | 65.3% | Chicago Heights School District 170 / 24,925 |
| 65. | 65.3% | Morrisonville Community Unit School District 1 / 1,992 |
| 66. | 64.9% | Cairo Community Unit School District 1 / 3,026 |
| 67. | 64.7% | Rhodes School District 84-5 / 5,096 |
| 68. | 64.5% | Rock Island School District 41 / 45,126 |
| 69. | 64.4% | V.I.T. Community Unit School District 2 / 2,373 |
| 70. | 64.4% | Norridge School District 80 / 12,332 |
| 71. | 63.9% | Fieldcrest Community Unit School District 6 / 7,089 |
| 72. | 63.8% | Forrestville Valley Community Unit School District 221 / 5,398 |
| 73. | 63.8% | Peoria Heights Community Unit School District 325 / 6,777 |
| 74. | 63.6% | Waverly Community Unit School District 6 / 2,031 |
| 75. | 63.6% | Galva Community Unit School District 224 / 3,728 |
| 76. | 63.6% | Polo Community Unit School District 222 / 4,138 |
| 77. | 63.2% | Harvey School District 152 / 16,749 |
| 78. | 63.2% | Ridgeview Community Unit School District 19 / 3,675 |
| 79. | 63.2% | Lincoln Elementary School District 156 / 7,603 |
| 80. | 63.1% | Lyons School District 103 / 22,468 |
| 80. | 63.1% | Prophetstown-Lyndon-Tampico Community Unit School District 3 / 5,979 |
| 82. | 63.1% | North Greene Unit School District 3 / 6,282 |
| 83. | 62.6% | Hoopeston Area Community Unit School District 11 / 7,157 |
| 84. | 62.6% | Annawan Community Unit School District 226 / 2,196 |
| 85. | 62.6% | Ohio Community High School District 505 / 832 |
| 86. | 62.5% | South Wilmington Consolidated School District 74 / 814 |
| 87. | 62.5% | Danville Community Consolidated School District 118 / 39,546 |
| 88. | 62.4% | Edgar County Community Unit District 6 / 2,323 |
| 89. | 62.4% | Ohio Community Consolidated School District 17 / 824 |
| 90. | 62.4% | Hoyleton Consolidated School District 29 / 898 |
| 91. | 62.4% | Eswood Community Consolidated District 269 / 874 |
| 92. | 62.2% | LaSalle-Peru Township High School District 120 / 29,237 |
| 93. | 62.1% | Grayville Community Unit School District 1 / 1,937 |
| 94. | 62.0% | Tri-Point Community Unit School District 6-J / 2,841 |
| 95. | 62.0% | Illini Central Community Unit School District 189 / 4,735 |
| 96. | 61.9% | Galesburg Community Unit School District 205 / 35,039 |
| 97. | 61.8% | Gibson City-Melvin-Sibley Community Unit School District 5 / 5,984 |
| 98. | 61.8% | Thornton School District 154 / 3,053 |
| 99. | 61.8% | Spring Valley Community Consolidated School District 99 / 5,982 |
| 100. | 61.7% | Milford Township High School District 233 / 3,908 |
| 100. | 61.7% | Milford Community Consolidated School District 280 / 3,908 |
| 102. | 61.7% | East St. Louis School District 189 / 38,613 |
| 103. | 61.6% | Iroquois West Community Unit School District 10 / 4,834 |
| 104. | 61.6% | Allen Township Community Consolidated School District 65 / 895 |
| 105. | 61.5% | Astoria Community Unit School District 1 / 2,277 |
| 106. | 61.5% | Joliet Public School District 86 / 85,318 |
| 107. | 61.4% | Rock Falls Elementary School District 13 / 7,720 |
| 108. | 61.4% | Oglesby Elementary School District 125 / 4,783 |
| 109. | 61.3% | Stark County Community Unit School District 100 / 4,624 |
| 110. | 61.3% | Chadwick-Milledgeville Community Unit School District 399 / 3,333 |
| 111. | 61.0% | Palestine Community Unit School District 3 / 2,588 |
| 112. | 60.9% | Hall High School District 502 / 9,173 |
| 113. | 60.7% | Leyden Community High School District 212 / 64,152 |
| 114. | 60.6% | DeLand-Weldon Community Unit School District 57 / 1,485 |
| 115. | 60.5% | South Fork School District 14 / 2,636 |
| 116. | 60.5% | Ladd Community Consolidated School District 94 / 1,572 |
| 117. | 60.4% | Greenview Community Unit School District 200 / 1,610 |
| 118. | 60.3% | Ashton Community Unit School District 275 / 4,188 |
| 119. | 60.2% | Nokomis Community Unit School District 22 / 4,427 |
| 120. | 60.0% | Steward Elementary School District 220 / 700 |
| 121. | 59.9% | Donovan Community Unit School District 3 / 2,316 |
| 122. | 59.9% | Roanoke-Benson Community Unit School District 60 / 3,403 |
| 123. | 59.9% | Nelson Public School District 8 / 486 |
| 124. | 59.8% | Mercer County School District 404 / 8,490 |
| 125. | 59.7% | Mount Prospect School District 57 / 19,665 |
| 125. | 59.7% | Marseilles Elementary School District 150 / 4,452 |
| 127. | 59.7% | Saunemin Community Consolidated School District 438 / 885 |
| 128. | 59.7% | Alwood Community Unit School District 225 / 2,276 |
| 129. | 59.7% | Creston Community Consolidated School District 161 / 1,095 |
| 130. | 59.6% | Berkeley School District 87 / 21,709 |
| 131. | 59.6% | Creve Coeur School District 76 / 6,123 |
| 132. | 59.3% | Lisbon Community Consolidated School District 90 / 891 |
| 133. | 59.3% | Jamaica Community Unit School District 12 / 2,392 |
| 134. | 59.1% | Kansas Community Unit School District 3 / 1,549 |
| 134. | 59.1% | Orangeville Community Unit School District 203 / 2,710 |
| 136. | 59.1% | Lovington Community Unit School District 303 / 1,740 |
| 137. | 58.9% | Delavan Community Unit School District 703 / 2,530 |
| 137. | 58.9% | Mount Pulaski Community Unit District 23 / 2,979 |
| 139. | 58.8% | Lawrence County Community Unit District 20 / 7,923 |
| 140. | 58.8% | Crescent Iroquois Community Unit School District 249 / 1,017 |
| 141. | 58.7% | Gillespie Community Unit School District 7 / 7,929 |
| 142. | 58.2% | Brown County Community Unit School District 1 / 6,907 |
| 143. | 58.2% | St. Anne Consolidated Community School District 256 / 2,856 |
| 144. | 58.1% | Peru Elementary School District 124 / 10,388 |
| 144. | 58.1% | Bement Community Unit School District 5 / 2,594 |
| 146. | 58.0% | Rockdale School District 84 / 2,192 |
| 147. | 57.9% | Park Ridge Consolidated Community School District 64 / 40,721 |
| 148. | 57.9% | Mendota Community Consolidated School District 289 / 10,235 |
| 149. | 57.9% | Paris-Union School District 95 / 8,759 |
| 150. | 57.8% | Mendota Township High School District 280 / 10,308 |
| 151. | 57.8% | West Prairie Community Unit School District 103 / 4,681 |
| 152. | 57.6% | Momence Community Unit School District 1 / 7,391 |
| 153. | 57.6% | Leepertown Community Consolidated School District 175 / 385 |
| 154. | 57.6% | Canton Union School District 66 / 17,765 |
| 155. | 57.6% | Griggsville-Perry Community Unit School District 4 / 2,185 |
| 156. | 57.4% | West Carroll Community Unit School District 314 / 8,816 |
| 157. | 57.3% | Westville Community Unit School District 2 / 6,880 |
| 158. | 57.1% | Tonica Community Consolidated School District 79 / 1,648 |
| 159. | 57.1% | Indian Creek Community Unit District 425 / 4,634 |
| 160. | 57.0% | Ridgewood Community High School District 234 / 19,090 |
| 161. | 56.9% | Peoria School District 150 / 101,678 |
| 161. | 56.9% | Moline Unit School District 40 / 48,009 |
| 163. | 56.8% | Warren Community Unit School District 205 / 2,974 |
| 164. | 56.8% | Central A & M Community Unit School District 21 / 4,819 |
| 165. | 56.7% | Burnham School District 154-5 / 1,552 |
| 166. | 56.7% | United Community School District 304 / 6,122 |
| 167. | 56.5% | Kings Consolidated School District 144 / 1,023 |
| 168. | 56.5% | South Pekin School District 137 / 1,977 |
| 169. | 56.5% | Aurora East Unit School District 131 / 81,256 |
| 170. | 56.4% | Warsaw Community Unit School District 316 / 2,841 |
| 171. | 56.4% | Pearl City Community Unit School District 200 / 2,879 |
| 172. | 56.4% | Roxana Community Unit School District 1 / 12,503 |
| 173. | 56.3% | Chaney-Monge School District 88 / 6,780 |
| 174. | 56.3% | Kankakee School District 111 / 33,001 |
| 175. | 56.2% | Belleville School District 118 / 38,003 |
| 176. | 56.1% | Calumet Public School District 132 / 11,547 |
| 177. | 56.1% | Anna Community Consolidated School District 37 / 6,790 |
| 178. | 56.1% | Flanagan-Cornell District 74 in Cornell / 1,018 |
| 178. | 56.1% | Cornell Community Consolidated School District 426 / 1,018 |
| 180. | 55.9% | Lincolnwood School District 74 / 12,538 |
| 181. | 55.8% | Decatur School District 61 / 72,287 |
| 182. | 55.8% | Princeton High School District 500 / 12,433 |
| 183. | 55.8% | Heritage Community Unit School District 8 / 2,989 |
| 184. | 55.7% | Granite City Community Unit School District 9 / 43,514 |
| 185. | 55.6% | Niles Township Community High School District 219 / 95,129 |
| 186. | 55.4% | Venice Community Unit School District 3 / 794 |
| 187. | 55.3% | Forest Park School District 91 / 14,039 |
| 188. | 55.3% | Ottawa Elementary School District 141 / 19,697 |
| 189. | 55.3% | Dolton School District 148 / 22,680 |
| 190. | 55.2% | Freeport School District 145 / 30,458 |
| 190. | 55.2% | Carthage Elementary School District 317 / 4,296 |
| 192. | 55.2% | Princeton Elementary School District 115 / 11,469 |
| 193. | 55.1% | Silvis School District 34 / 5,528 |
| 194. | 55.1% | Chester Non-High School District 122 / 809 |
| 194. | 55.1% | Prairie du Rocher Community Consolidated School District 134 / 809 |
| 196. | 55.0% | Lowpoint-Washburn Community Unit School District 21 / 2,501 |
| 197. | 55.0% | Prairie Central Community Unit School District 8 / 11,458 |
| 198. | 54.9% | Beardstown Community Unit School District 15 / 7,937 |
| 199. | 54.9% | Princeville Community Unit School District 326 / 4,234 |
| 200. | 54.9% | Lewistown Community Unit School District 97 / 4,876 |
| 201. | 54.7% | Skokie-Fairview School District 72 / 6,009 |
| 202. | 54.7% | Stockton Community Unit School District 206 / 3,941 |
| 203. | 54.7% | Rossville-Alvin Community Unit School District 7 / 2,473 |
| 204. | 54.6% | Armstrong Township High School District 225 / 1,315 |
| 205. | 54.5% | Western Community Unit School District 12 / 3,791 |
| 206. | 54.5% | Greenfield Community Unit School District 10 / 3,122 |
| 207. | 54.3% | Shelbyville Community Unit School District 4 / 7,879 |
| 208. | 54.3% | Lee Center Community Unit School District 271 / 1,764 |
| 209. | 54.2% | Triopia Community Unit School District 27 / 2,227 |
| 210. | 54.1% | Skokie School District 69 / 18,384 |
| 211. | 54.1% | Cambridge Community Unit School District 227 / 3,072 |
| 212. | 54.0% | Illini West High School District 307 / 8,441 |
| 213. | 53.9% | Winchester Community Unit School District 1 / 3,787 |
| 214. | 53.9% | Lockport School District 91 / 6,587 |
| 214. | 53.9% | Skokie School District 68 / 20,021 |
| 216. | 53.8% | La Harpe Community School District 347 / 2,128 |
| 216. | 53.8% | Atwood-Hammond Community Unit School District 39 / 2,352 |
| 218. | 53.7% | Cissna Park Community Unit School District 6 / 1,927 |
| 218. | 53.7% | Windsor Community Unit School District 1 / 2,800 |
| 220. | 53.7% | Georgetown-Ridge Farm Consolidated Unit School District 4 / 6,846 |
| 221. | 53.6% | Harrison School District 36 / 3,891 |
| 221. | 53.6% | Cerro Gordo Community Unit School District 100 / 3,021 |
| 223. | 53.6% | Woodland Community Unit School District 5 / 2,848 |
| 224. | 53.6% | Oblong Community Unit School District 4 / 3,763 |
| 225. | 53.5% | Potomac Community Unit School District 10 / 1,458 |
| 226. | 53.5% | Sterling Community Unit District 5 / 21,414 |
| 227. | 53.2% | Bushnell-Prairie City Community Unit School District 170 / 4,431 |
| 228. | 53.0% | Elmhurst School District 205 / 46,896 |
| 229. | 52.8% | Paxton-Buckley-Loda Community Unit School District 10 / 8,867 |
| 230. | 52.8% | Oak Grove School District 68 / 4,037 |
| 231. | 52.7% | Mount Olive Community Unit School District 5 / 3,490 |
| 232. | 52.6% | Norwood Elementary School District 63 / 4,120 |
| 233. | 52.5% | Camp Point Community Unit School District 3 / 4,941 |
| 234. | 52.4% | Morton Grove School District 70 / 9,084 |
| 235. | 52.4% | Frankfort Community Unit School District 168 / 11,994 |
| 236. | 52.3% | Alton Community Unit School District 11 / 48,625 |
| 237. | 52.2% | Dixon Unit School District 170 / 22,927 |
| 238. | 52.2% | Dallas Elementary School District 327 / 2,017 |
| 239. | 52.1% | Hazel Crest School District 152-5 / 8,671 |
| 240. | 52.1% | Morrison Community Unit School District 6 / 6,761 |
| 241. | 52.0% | Homewood School District 153 / 15,746 |
| 242. | 52.0% | Clinton Community Unit School District 15 / 11,849 |
| 243. | 52.0% | Elmwood Community Unit School District 322 / 4,113 |
| 244. | 51.9% | Wethersfield Community Unit School District 230 / 3,967 |
| 245. | 51.8% | Lena-Winslow Community Unit School District 202 / 4,878 |
| 246. | 51.7% | Oregon Community Unit School District 220 / 10,621 |
| 247. | 51.7% | Farmington Central Community Unit School District 265 / 8,236 |
| 248. | 51.6% | Robein School District 85 / 2,008 |
| 248. | 51.6% | Mattoon Community Unit School District 2 / 23,059 |
| 248. | 51.6% | Atwood Heights School District 125 / 7,582 |
| 251. | 51.5% | Abingdon Community Unit School District 217 / 3,967 |
| 252. | 51.4% | Blue Ridge Community Unit School District 18 / 5,559 |
| 253. | 51.4% | Earlville Community Unit School District 9 / 2,770 |
| 254. | 51.4% | Pana Community Unit School District 8 / 9,525 |
| 255. | 51.3% | Virginia Community Unit School District 64 / 2,185 |
| 256. | 51.3% | Sangamon Valley Community Unit School District 9 / 4,232 |
| 257. | 51.3% | Nauvoo-Colusa Community Unit School District 325 / 2,155 |
| 258. | 51.2% | Carmi-White County Community Unit School District 5 / 9,412 |
| 259. | 51.2% | Hiawatha Community Unit School District 426 / 3,124 |
| 260. | 51.1% | Amboy Community Unit School District 272 / 5,277 |
| 261. | 51.0% | Union Ridge School District 86 / 6,160 |
| 262. | 51.0% | South Holland School District 151 / 13,070 |
| 263. | 50.9% | Schuyler-Industry Community Unit School District 5 / 7,910 |
| 263. | 50.9% | Pekin Public School District108 / 34,079 |
| 263. | 50.9% | Grass Lake School District 36 / 2,523 |
| 266. | 50.9% | Golf Elementary School District 67 / 6,489 |
| 267. | 50.8% | Oakland Community Unit School District 5 / 1,740 |
| 268. | 50.8% | Name N/A / 8,629 |
| 269. | 50.8% | Wabash Community Unit School District 348 / 10,870 |
| 270. | 50.7% | A-C Central Community Unit School District 262 / 2,927 |
| 271. | 50.7% | Lincoln Elementary School District 27 / 12,793 |
| 272. | 50.6% | Martinsville Community Unit School District 3C / 2,262 |
| 273. | 50.5% | Taylorville Community Unit School District 3 / 18,710 |
| 274. | 50.5% | Stewardson-Strasburg Community Unit District 5A / 2,456 |
| 275. | 50.4% | Waukegan Community Unit School District 60 / 83,983 |
| 276. | 50.4% | Leland Community Unit School District 1 / 1,864 |
| 277. | 50.3% | Havana Community Unit School District 126 / 6,562 |
| 278. | 50.3% | Sunset Ridge School District 29 / 4,151 |
| 279. | 50.1% | Dwight Township High School District 230 / 6,861 |
| 280. | 50.0% | Quincy School District 172 / 50,972 |
| 281. | 50.0% | El Paso-Gridley Community Unit School District 11 / 6,967 |
| 282. | 50.0% | ROWVA Community Unit School District 208 / 4,056 |
| 283. | 50.0% | Panhandle Community Unit School District 2 / 2,889 |
| 284. | 49.9% | Gardner Community Consolidated School District 72C / 1,724 |
| 285. | 49.8% | Washington School District 52 / 8,364 |
| 286. | 49.8% | Olympia Community Unit School District 16 / 11,473 |
| 286. | 49.8% | Lyons Township High School District 204 / 68,460 |
| 288. | 49.8% | Okaw Valley Community Unit School District 302 / 3,417 |
| 289. | 49.7% | Red Hill Community Unit School District 10 / 8,881 |
| 290. | 49.6% | Ottawa Township High School District 140 / 31,742 |
| 291. | 49.5% | Christopher Community Unit School District 99 / 4,575 |
| 292. | 49.4% | Central Stickney School District 110 / 3,097 |
| 293. | 49.4% | Erie Community Unit School District 1 / 3,452 |
| 294. | 49.4% | Schiller Park School District 81 / 12,877 |
| 295. | 49.4% | Edwards County Community Unit School District 1 / 5,959 |
| 296. | 49.3% | Carbon Cliff-Barstow School District 36 / 1,906 |
| 297. | 49.3% | Pekin Community High School District 303 / 45,803 |
| 298. | 49.1% | Zeigler-Royalton Community Unit School District 188 / 4,069 |
| 299. | 49.0% | Fairfield Public School District 112 / 5,939 |
| 300. | 49.0% | Cahokia Community Unit School District 187 / 19,432 |
| 301. | 48.9% | Cook County School District 130 / 28,926 |
| 302. | 48.9% | Vandalia Community Unit School District 203 / 11,157 |
| 303. | 48.8% | Tamaroa School District 5 / 982 |
| 304. | 48.7% | Meridian Community Unit School District 101 / 3,462 |
| 305. | 48.7% | Avoca School District 37 / 6,689 |
| 306. | 48.7% | Villa Grove Community Unit School District 302 / 4,079 |
| 307. | 48.6% | Dwight Common School District 232 / 6,632 |
| 307. | 48.6% | Litchfield Community Unit School District 12 / 8,902 |
| 309. | 48.5% | Rock Falls Township High School District 301 / 14,683 |
| 310. | 48.4% | Villa Park School District 45 / 36,595 |
| 311. | 48.4% | Armstrong-Ellis Consolidated School District 61 / 818 |
| 312. | 48.4% | Pleasant Hill Community Unit School District 3 / 2,142 |
| 312. | 48.4% | Edinburg Community Unit School District 4 / 1,861 |
| 314. | 48.3% | Cypress School District 64 / 1,083 |
| 314. | 48.3% | Anna Jonesboro Community High School District 81 / 11,122 |
| 316. | 48.2% | Lansing School District 158 / 22,932 |
| 317. | 48.2% | Robinson Community Unit School District 2 / 11,990 |
| 318. | 48.2% | Hoover-Schrum Memorial School District 157 / 8,826 |
| 319. | 48.2% | Buncombe Consolidated School District 43 / 714 |
| 320. | 48.1% | Hutsonville Community Unit School District 1 / 2,328 |
| 321. | 48.1% | Lexington Community Unit School District 7 / 3,014 |
| 322. | 48.1% | Dupo Community Unit School District 196 / 6,958 |
| 323. | 48.0% | Pontiac Township High School District 90 / 16,096 |
| 324. | 47.9% | Hillsboro Community Unit School District 3 / 14,003 |
| 324. | 47.9% | General George Patton School District 133 / 2,314 |
| 326. | 47.9% | Pikeland Community Unit School District 10 / 8,507 |
| 327. | 47.9% | Meredosia-Chambersburg Community Unit School District 11 / 1,616 |
| 328. | 47.9% | East Peoria Community High School District 309 / 26,288 |
| 328. | 47.9% | Oak Lawn-Hometown School District 123 / 34,761 |
| 330. | 47.8% | Carrollton Community Unit School District 1 / 4,067 |
| 331. | 47.8% | Staunton Community Unit School District 6 / 8,256 |
| 332. | 47.6% | Franklin Community Unit School District 1 / 2,005 |
| 333. | 47.6% | Jacksonville School District 117 / 28,304 |
| 334. | 47.6% | Iroquois County Community Unit School District 9 / 7,216 |
| 335. | 47.6% | Chester Community Unit School District 139 / 11,500 |
| 336. | 47.5% | Lincoln Community High School District 404 / 24,227 |
| 337. | 47.5% | Gardner-South Wilmington Township High School District / 4,004 |
| 338. | 47.4% | Mount Vernon School District 80 / 14,109 |
| 339. | 47.4% | Carlinville Community Unit School District 1 / 9,554 |
| 340. | 47.4% | River Grove School District 85-5 / 7,640 |
| 341. | 47.3% | Putnam County Community Unit School District 535 / 5,455 |
| 342. | 47.2% | Benton Community Consolidated School District 47 / 10,110 |
| 343. | 47.2% | Fulton County Community Unit School District 3 / 3,738 |
| 344. | 47.2% | Colona School District 190 / 4,182 |
| 345. | 47.1% | Harrisburg Community Unit School District 3 / 12,928 |
| 346. | 46.9% | Nashville Consolidated Community School District 49 / 5,724 |
| 347. | 46.8% | Northwestern Community Unit School District 2 / 2,466 |
| 348. | 46.8% | Steger School District 194 / 13,624 |
| 349. | 46.7% | Casey-Westfield Community Unit School District 4C / 5,945 |
| 350. | 46.7% | Marissa Community Unit School District 40 / 3,551 |
| 350. | 46.7% | Steeleville Community Unit School District 138 / 2,829 |
| 352. | 46.7% | River Bend Community Unit District 2 / 6,692 |
| 353. | 46.6% | Century Community Unit School District 100 / 2,732 |
| 354. | 46.5% | St. Anne Community High School District 302 / 4,793 |
| 355. | 46.4% | Centralia School District 135 / 13,480 |
| 356. | 46.3% | Bloomington School District 87 / 45,049 |
| 357. | 46.3% | Brussels Community Unit School District 42 / 1,347 |
| 358. | 46.1% | Eastland Community Unit School District 308 / 4,258 |
| 359. | 46.1% | Central Community Unit School District 4 / 6,895 |
| 360. | 46.1% | Pontiac Community Consolidated School District 429 / 13,526 |
| 361. | 45.9% | St. Elmo Community Unit School District 202 / 2,819 |
| 362. | 45.8% | Niles Elementary School District 71 / 8,060 |
| 363. | 45.7% | North Pekin-Marquette Heights School District 102 / 5,184 |
| 364. | 45.7% | Rooks Creek Community Consolidated School District 425 / 475 |
| 365. | 45.4% | Benton Consolidated High School District 103 / 12,657 |
| 366. | 45.3% | Cumberland Community Unit School District 77 / 6,296 |
| 367. | 45.3% | West Washington County Community Unit District 10 / 4,079 |
| 368. | 45.3% | Tuscola Community Unit School District 301 / 5,877 |
| 369. | 45.2% | Sullivan Community Unit School District 300 / 7,390 |
| 370. | 45.2% | Joliet Township High School District 204 / 129,192 |
| 371. | 45.2% | Avon Community Unit School District 176 / 1,594 |
| 372. | 45.1% | Hamilton County Community Unit School District 10 / 7,826 |
| 373. | 45.0% | Bloom Township High School District 206 / 65,207 |
| 374. | 45.0% | South Central Community Unit School District 401 / 4,761 |
| 375. | 45.0% | Nashville Community High School District 99 / 9,049 |
| 376. | 45.0% | North Wayne Community Unit School District 200 / 2,671 |
| 377. | 44.9% | Rantoul City School District 137 / 12,569 |
| 378. | 44.9% | Oak Lawn Community High School District 229 / 39,686 |
| 379. | 44.9% | East Peoria School District 86 / 18,705 |
| 380. | 44.8% | Pinckneyville School District 50 / 6,670 |
| 380. | 44.8% | Wayne City Community Unit School District 100 / 3,487 |
| 382. | 44.6% | Rockford School District 205 / 192,951 |
| 383. | 44.5% | Sesser-Valier Community Unit School District 196 / 4,199 |
| 384. | 44.3% | Newark Community High School District 18 / 3,566 |
| 385. | 44.3% | Knoxville Community Unit School District 202 / 6,138 |
| 386. | 44.2% | Du Quoin Community Unit School District 300 / 9,506 |
| 387. | 44.1% | Morris School District 54 / 11,454 |
| 388. | 44.1% | North Shore School District 112 / 35,742 |
| 389. | 44.1% | Springfield School District 186 / 113,809 |
| 390. | 44.0% | Irvington County Community Unit School District 11 / 804 |
| 391. | 43.9% | Galena Unit School District 120 / 5,910 |
| 392. | 43.8% | Hardin County Community Unit School District 1 / 4,315 |
| 393. | 43.8% | Oakwood Community Unit School District 76 / 6,107 |
| 394. | 43.7% | Pinckneyville Community High School District 101 / 11,188 |
| 395. | 43.7% | Johnston City Community Unit School District 1 / 7,511 |
| 396. | 43.6% | Mazon-Verona-Kinsman Elementary School District 2C / 2,863 |
| 397. | 43.6% | Murphysboro Community Unit School District 186 / 15,439 |
| 398. | 43.6% | Dongola School Unit District 66 / 1,869 |
| 399. | 43.5% | Maine Township High School District 207 / 144,996 |
| 400. | 43.4% | Community Unit School District 4 / 4,031 |
| 401. | 43.4% | Gavin School District 37 / 7,597 |
| 402. | 43.4% | Thornton Fractional Township High School District 215 / 61,172 |
| 403. | 43.3% | North Wamac School District 186 / 987 |
| 404. | 43.3% | Grand Ridge Community Consolidated School District 95 / 2,573 |
| 404. | 43.3% | Herrin Community Unit School District 4 / 16,258 |
| 406. | 43.3% | Norris City-Omaha-Enfield Community Unit School District 3 / 4,367 |
| 407. | 43.2% | Arthur Community Unit School District 305 / 5,848 |
| 408. | 43.2% | Midland Community Unit School District 7 / 5,353 |
| 409. | 43.2% | Pennoyer School District 79 / 5,752 |
| 410. | 43.1% | Reavis Township High School District 220 / 33,088 |
| 411. | 43.0% | Fox River Grove Consolidated School District 3 / 4,465 |
| 412. | 43.0% | Dalzell School District 98 / 816 |
| 413. | 42.7% | Thornton Township High School District 205 / 114,616 |
| 414. | 42.7% | Limestone Community High School District 310 / 22,942 |
| 415. | 42.7% | Lebanon Community Unit School District 9 / 5,513 |
| 416. | 42.6% | Scott-Morgan Consolidated Unit School District 2 / 1,539 |
| 417. | 42.6% | New Athens Community Unit School District 60 / 4,120 |
| 418. | 42.5% | Burbank School District 111 / 29,991 |
| 419. | 42.5% | Eldorado Community Unit School District 4 / 7,166 |
| 420. | 42.4% | Bond County Community Unit School District 2 / 13,536 |
| 421. | 42.4% | Payson Community Unit School District 1 / 3,651 |
| 422. | 42.4% | Carrier Mills-Stonefort Community Unit School District / 2,700 |
| 423. | 42.3% | Zion Elementary School District 6 / 17,477 |
| 424. | 42.3% | Fisher Community Unit School District 1 / 3,455 |
| 425. | 42.2% | Illinois Valley Central Unit School District 321 / 13,630 |
| 426. | 42.1% | River Ridge Community Unit School District 210 / 3,681 |
| 427. | 41.9% | Auburn Community Unit School District 10 / 7,144 |
| 428. | 41.8% | St. Libory Consolidated School District 30 / 857 |
| 429. | 41.8% | Centralia High School District 200 / 21,582 |
| 430. | 41.6% | LaGrange School District 105 / 12,677 |
| 430. | 41.6% | West Central Community Unit School District 235 / 6,393 |
| 432. | 41.6% | Hillside School District 93 / 5,234 |
| 433. | 41.5% | High Mount School District 116 / 3,993 |
| 434. | 41.4% | Ramsey Community Unit School District 204 / 2,867 |
| 435. | 41.4% | Midlothian School District 143 / 15,081 |
| 435. | 41.4% | Fairfield Community High School District 225 / 10,231 |
| 437. | 41.3% | Catlin Community Unit School District 5 / 3,151 |
| 438. | 41.3% | Bradley School District 61 / 12,688 |
| 439. | 41.2% | Jonesboro Community Consolidated School District 43 / 2,981 |
| 440. | 41.2% | Ashley Community Consolidated School District 15 / 2,130 |
| 441. | 41.1% | Des Plaines Community Consolidated School District 62 / 51,169 |
| 442. | 41.1% | Homewood-Flossmoor Community High School District 233 / 38,230 |
| 443. | 41.0% | Rantoul Township High School District 193 / 17,434 |
| 444. | 40.9% | Worth School District 127 / 11,367 |
| 445. | 40.9% | Taft School District 90 / 3,929 |
| 446. | 40.6% | Gifford Community Consolidated School District 188 / 1,792 |
| 446. | 40.6% | Grant Park Community Unit School District 6 / 3,281 |
| 448. | 40.6% | Orion Community Unit School District 223 / 6,330 |
| 449. | 40.6% | United Township High School District 30 / 41,098 |
| 450. | 40.6% | Newark Community Consolidated School District 66 / 2,493 |
| 451. | 40.5% | Beecher City Community Unit School District 20 / 2,588 |
| 452. | 40.5% | Township High School District 113 / 58,731 |
| 453. | 40.3% | Geneseo Community Unit School District 228 / 15,497 |
| 454. | 40.2% | Paris Community Unit School District 4 / 4,200 |
| 455. | 40.2% | District 50 Schools / 7,128 |
| 456. | 40.2% | Grant Community Consolidated School District 110 / 7,563 |
| 456. | 40.2% | Calhoun Community Unit School District 40 / 3,386 |
| 456. | 40.2% | Alden-Hebron School District 19 / 2,607 |
| 459. | 40.1% | North Chicago School District 187 / 29,740 |
| 460. | 40.1% | Pope County Community Unit School District 1 / 4,399 |
| 461. | 39.9% | Egyptian Community Unit School District 5 / 3,817 |
| 462. | 39.8% | Northbrook School District 28 / 14,240 |
| 463. | 39.7% | Hinckley-Big Rock Community Unit School District 429 / 4,774 |
| 464. | 39.7% | Sparta Community Unit School District 140 / 8,677 |
| 465. | 39.6% | Patoka Community Unit School District 100 / 1,541 |
| 466. | 39.6% | Argenta-Oreana Community Unit School District 1 / 3,906 |
| 467. | 39.5% | Macomb Community Unit School District 185 / 22,522 |
| 468. | 39.5% | Sherrard Community Unit School District 200 / 9,578 |
| 469. | 39.4% | Meridian Community Unit School District 15 / 6,419 |
| 469. | 39.4% | Laraway Community Consolidated School District 70C / 3,218 |
| 471. | 39.3% | Massac Unit School District 1 / 13,833 |
| 472. | 39.2% | Dakota Community Unit School District 201 / 4,710 |
| 473. | 39.2% | Clay City Community Unit District 10 / 2,309 |
| 474. | 39.1% | Ewing Northern Community Consolidated District 115 / 1,872 |
| 475. | 39.1% | Marshall Community Unit School District 2C / 8,285 |
| 476. | 39.1% | Henry-Senachwine Consolidated Unit School District 5 / 3,791 |
| 477. | 39.0% | Glen Ellyn School District 41 / 29,745 |
| 478. | 38.9% | Deer Park Community Consolidated School District 82 / 757 |
| 479. | 38.6% | Geff Community Consolidated School District 14 / 974 |
| 480. | 38.6% | Jasper County Community Unit School District 1 / 9,433 |
| 481. | 38.6% | Harmony Emge School District 175 / 10,417 |
| 482. | 38.6% | Jersey Community Unit School District 100 / 20,016 |
| 483. | 38.5% | Flora Community Unit School District 35 / 8,311 |
| 484. | 38.4% | West Harvey-Dixmoor Public School District 147 / 10,106 |
| 485. | 38.4% | Breese School District 12 / 7,070 |
| 486. | 38.4% | Bannockburn School District 106 / 2,091 |
| 487. | 38.3% | Williamsfield Community Unit School District 210 / 1,726 |
| 488. | 38.3% | West Richland Community Unit School District 2 / 2,124 |
| 488. | 38.3% | Cobden School Unit District 17 / 3,998 |
| 490. | 38.3% | Gallatin Community Unit School District 7 / 5,403 |
| 491. | 38.2% | Name N/A / 1,740 |
| 492. | 38.2% | Midwest Central Community Unit School District 191 / 6,566 |
| 492. | 38.2% | Galatia Community Unit School District 1 / 2,514 |
| 494. | 38.2% | Rochelle Township High School District 212 / 17,208 |
| 494. | 38.2% | Hamilton Community Consolidated School District 328 / 3,924 |
| 496. | 38.0% | Wilmington Community Unit School District 209U / 9,554 |
| 497. | 37.9% | East Richland Community Unit School District 1 / 14,098 |
| 498. | 37.9% | Collinsville Community Unit School District 10 / 48,357 |
| 499. | 37.8% | Flossmoor School District 161 / 22,158 |
| 500. | 37.6% | Le Roy Community Unit School District 2 / 4,561 |
| 501. | 37.6% | Dimmick Community Consolidated School District 175 / 1,128 |
| 502. | 37.6% | Mundelein Elementary School District 75 / 14,736 |
| 503. | 37.6% | East Moline School District 37 / 27,063 |
| 504. | 37.5% | Brownstown Community Unit School District 201 / 2,179 |
| 505. | 37.4% | Community High School District 218 / 121,659 |
| 505. | 37.4% | East Coloma School District 12 / 2,578 |
| 507. | 37.4% | Belleville Township High School District 201 / 108,596 |
| 508. | 37.3% | Allendale Community Consolidated School District 17 / 1,065 |
| 509. | 37.3% | South Beloit Community Unit School District 320 / 6,667 |
| 510. | 37.2% | Calumet City School District 155 / 11,417 |
| 511. | 37.1% | Chester-East Lincoln Community Csd 61 / 5,509 |
| 511. | 37.1% | Herscher Community Unit School District 2 / 10,714 |
| 513. | 37.0% | Summersville School District 79 / 1,948 |
| 514. | 36.8% | Mount Vernon Township High School District 201 / 29,842 |
| 515. | 36.7% | Tolono Community Unit School District 7 / 9,762 |
| 516. | 36.5% | Community Consolidated School District 168 / 10,276 |
| 517. | 36.2% | Salem School District 111 / 8,940 |
| 518. | 36.2% | Cowden-Herrick Community Unit School District 3A / 2,445 |
| 519. | 36.2% | Mulberry Grove Community Unit School District 1 / 2,453 |
| 520. | 36.1% | Harvard Community Unit School District 50 / 13,577 |
| 521. | 36.0% | Argo Community High School District 217 / 40,342 |
| 522. | 36.0% | Dieterich Community Unit School District 30 / 2,220 |
| 522. | 36.0% | Prairieview-Ogden Community Consolidated School District 197 / 2,341 |
| 524. | 35.9% | Elverado Community Unit School District 196 / 2,888 |
| 525. | 35.9% | Neoga Community Unit School District 3 / 5,011 |
| 526. | 35.8% | Community Consolidated School District 204 / 3,601 |
| 527. | 35.8% | Porta Community Unit School District 202 / 7,357 |
| 528. | 35.8% | Joppa-Maple Grove Unit District 38 / 1,481 |
| 529. | 35.6% | East Dubuque Community Unit School District 119 / 4,461 |
| 530. | 35.6% | Seneca Township High School District 160 / 7,284 |
| 531. | 35.5% | Central City School District 133 / 2,193 |
| 532. | 35.5% | Hinsdale Community Consolidated School District 181 / 25,590 |
| 533. | 35.5% | Red Bud Community Unit School District 132 / 8,016 |
| 533. | 35.5% | Monticello Community Unit School District 25 / 8,976 |
| 535. | 35.4% | Brooklyn Community Unit School District 188 / 669 |
| 536. | 35.3% | Arcola Consolidated Unit School District 306 / 4,501 |
| 537. | 35.3% | Sandoval Community Unit School District 501 / 2,607 |
| 538. | 35.2% | Waltham Community Consolidated School District 185 / 2,311 |
| 539. | 35.1% | Germantown School District 60 / 1,741 |
| 540. | 34.9% | Name N/A / 4,792,985 |
| 541. | 34.9% | Coulterville Unit School District 1 / 1,653 |
| 542. | 34.8% | Lombard School District 44 / 34,825 |
| 543. | 34.8% | Posen-Robbins Elementary School District 143-5 / 12,153 |
| 544. | 34.8% | Ina Community Consolidated School District 8 / 3,085 |
| 545. | 34.7% | Braceville School District 75 / 1,466 |
| 546. | 34.6% | Glenview Community Consolidated School District 34 / 39,997 |
| 546. | 34.6% | Akin Community Consolidated School District 91 / 775 |
| 548. | 34.6% | North Clay Community Unit School District 25 / 3,858 |
| 549. | 34.6% | Wesclin Community Unit School District 3 / 7,929 |
| 550. | 34.5% | Trico Community Unit School District 176 / 6,443 |
| 551. | 34.3% | Marengo-Union Elementary Consolidated District 165 / 10,564 |
| 552. | 34.3% | Riverdale Community Unit School District 100 / 6,633 |
| 553. | 34.2% | Pecatonica Community Unit School District 321 / 5,318 |
| 554. | 34.1% | East Maine School District 63 / 46,697 |
| 555. | 33.8% | Deer Creek-Mackinaw Community Unit School District 701 / 5,860 |
| 556. | 33.7% | Arlington Heights School District 25 / 50,272 |
| 557. | 33.7% | Altamont Community Unit School District 10 / 5,014 |
| 558. | 33.6% | Deerfield School District 109 / 20,914 |
| 559. | 33.5% | Pawnee Community Unit School District 11 / 3,218 |
| 560. | 33.5% | Eureka Community Unit District 140 / 9,774 |
| 561. | 33.4% | Rockridge Community Unit School District 300 / 7,258 |
| 562. | 33.3% | Bensenville School District 2 / 19,373 |
| 563. | 33.2% | Winnebago Community Unit School District 323 / 8,280 |
| 564. | 33.2% | Charleston Community Unit School District 1 / 28,530 |
| 565. | 33.1% | DuPage High School District 88 / 82,688 |
| 566. | 33.1% | LaGrange Highlands School District 106 / 8,973 |
| 567. | 33.0% | Rochelle Community Consolidated District 231 / 13,516 |
| 568. | 32.9% | Tremont Community Unit School District 702 / 5,004 |
| 569. | 32.6% | Kell Consolidated School District 2 / 904 |
| 570. | 32.6% | Vienna High School District 133 / 9,283 |
| 570. | 32.6% | Washington Community High School District 308 / 23,440 |
| 572. | 32.5% | Bunker Hill Community Unit School District 8 / 4,291 |
| 573. | 32.5% | Westmont Community Unit School District 201 / 12,521 |
| 574. | 32.3% | Roselle School District 12 / 7,010 |
| 575. | 32.3% | Tri-City Community Unit School District 1 / 2,974 |
| 576. | 32.2% | Aurora West Unit School District 129 / 76,944 |
| 577. | 32.1% | Hollis Consolidated School District 328 / 760 |
| 578. | 32.1% | Liberty Community Unit School District 2 / 3,412 |
| 579. | 32.0% | Central Community High School District 71 / 16,423 |
| 580. | 31.9% | Damiansville School District 62 / 788 |
| 581. | 31.8% | Morris Community High School District 101 / 18,146 |
| 582. | 31.7% | Lake Bluff Elementary School District 65 / 8,302 |
| 583. | 31.6% | Community Unit School District 2 / 6,214 |
| 584. | 31.6% | New Hope Community Consolidated School District 6 / 1,701 |
| 585. | 31.5% | Highland Community Unit School District 5 / 18,121 |
| 586. | 31.3% | New Simpson Hill Consolidated District 32 / 3,055 |
| 587. | 31.3% | Salem Community High School District 600 / 15,160 |
| 588. | 31.3% | Shirland Community Consolidated School District 134 / 1,353 |
| 589. | 31.3% | Libertyville School District 70 / 18,417 |
| 590. | 31.3% | Warrensburg-Latham Community Unit District 11 / 6,092 |
| 591. | 31.2% | Pembroke Consolidated Community School District 259 / 1,937 |
| 592. | 31.2% | Diamond Lake School District 76 / 8,892 |
| 593. | 31.2% | Carlyle Community Unit School District 1 / 10,091 |
| 594. | 31.1% | Seneca Community Consolidated School District 170 / 3,662 |
| 595. | 31.0% | Ludlow Community Consolidated School District 142 / 1,012 |
| 596. | 30.9% | Heyworth Community Unit School District 4 / 4,866 |
| 597. | 30.8% | Fenton Community High School District 100 / 29,827 |
| 598. | 30.8% | Fairmont School District 89 / 3,800 |
| 599. | 30.8% | Marion Community Unit School District 2 / 28,098 |
| 600. | 30.6% | Genoa-Kingston Community Unit School District 424 / 9,126 |
| 600. | 30.6% | North Boone Community Unit School District 200 / 8,634 |
| 602. | 30.4% | Rich Township High School District 227 / 68,652 |
| 603. | 30.3% | Metamora Community Consolidated School District 1 / 6,947 |
| 604. | 30.2% | Durand Community Unit School District 322 / 3,955 |
| 605. | 30.0% | Ridgeland School District 122 / 21,369 |
| 606. | 30.0% | Bethalto Consolidated Unit School District 8 / 16,328 |
| 607. | 29.9% | Brimfield Community Unit School District 309 / 3,489 |
| 608. | 29.7% | Beecher Community Unit School District 200U / 6,728 |
| 609. | 29.7% | Shawnee Community Unit School District 84 / 2,700 |
| 610. | 29.6% | Spring Lake Community Consolidated School District 606 / 736 |
| 611. | 29.5% | Tri-Valley Community Unit School District 3 / 4,607 |
| 612. | 29.4% | Lake Forest Community High School District 115 / 27,370 |
| 613. | 29.3% | Harlem Unit School District 122 / 45,149 |
| 614. | 29.0% | Riverview Consolidated Community School District 2 / 2,927 |
| 615. | 28.9% | Southwestern Community Unit School District 9 / 9,523 |
| 616. | 28.8% | Iuka Community Consolidated School District 7 / 1,991 |
| 617. | 28.7% | Lake Forest School District 67 / 18,836 |
| 618. | 28.7% | Downers Grove Grade School District 58 / 52,346 |
| 619. | 28.6% | Athens Community Unit School District 213 / 5,051 |
| 620. | 28.6% | Marengo Community High School District 154 / 14,202 |
| 620. | 28.6% | Rutland Community Consolidated School District 230 / 747 |
| 622. | 28.4% | Thomasboro Community Consolidated School District 130 / 2,248 |
| 623. | 28.2% | Bluford Community Consolidated School District 114 / 2,710 |
| 624. | 28.2% | Union School District 81 / 1,473 |
| 625. | 28.1% | Urbana School District 116 / 50,724 |
| 626. | 28.1% | Sycamore Community Unit School District 427 / 22,322 |
| 627. | 28.0% | Limestone Walters Community Consolidated School District 316 / 1,753 |
| 628. | 27.8% | Elwood Community Consolidated School District 203 / 3,514 |
| 629. | 27.7% | Fox Lake Grade School District 114 / 8,600 |
| 630. | 27.7% | De Soto Consolidated School District 86 / 1,909 |
| 631. | 27.6% | Crab Orchard Community Unit School District 3 / 2,480 |
| 632. | 27.5% | Effingham Community Unit School District 40 / 20,242 |
| 633. | 27.5% | West Chicago School District 33 / 30,843 |
| 634. | 27.5% | Webber Township High School District 204 / 3,066 |
| 635. | 27.4% | Freeburg Community Consolidated School District 70 / 7,648 |
| 636. | 27.3% | Illini Bluffs Community Unit School District 327 / 5,690 |
| 637. | 27.2% | Prairie-Hills Elementary School District 144 / 22,582 |
| 638. | 27.2% | Johnsburg Community Unit School District 12 / 12,276 |
| 639. | 27.0% | Dolton School District 149 / 26,527 |
| 640. | 26.9% | Freeburg Community High School District 77 / 12,715 |
| 641. | 26.9% | Winthrop Harbor School District 1 / 6,689 |
| 642. | 26.8% | Willow Grove School District 46 / 2,354 |
| 643. | 26.7% | McHenry Community High School District 156 / 46,490 |
| 644. | 26.7% | Woodstock Community Unit School District 200 / 37,344 |
| 645. | 26.6% | Oakdale Community Consolidated School District 1 / 684 |
| 646. | 26.6% | Teutopolis Community Unit School District 50 / 5,557 |
| 647. | 26.5% | Salt Creek School District 48 / 8,045 |
| 647. | 26.5% | Northfield Township High School District 225 / 85,444 |
| 649. | 26.5% | Champaign Community Unit School District 4 / 93,805 |
| 650. | 26.4% | Antioch Community Consolidated School District 34 / 23,358 |
| 651. | 26.4% | Vienna School District 55 / 4,431 |
| 652. | 26.4% | Riverdale School District 14 / 1,378 |
| 653. | 26.3% | Belle Valley School District 119 / 9,044 |
| 654. | 26.2% | Metamora Township High School District 122 / 16,099 |
| 655. | 26.2% | Bremen Community High School District 228 / 94,256 |
| 656. | 26.2% | DeKalb Community Unit School District 428 / 52,331 |
| 657. | 26.2% | Zion-Benton Township High School District 126 / 44,722 |
| 658. | 26.2% | Wood Dale School District 7 / 10,454 |
| 659. | 26.0% | Will County School District 92 / 14,486 |
| 660. | 26.0% | Ford Heights School District 169 / 2,787 |
| 661. | 25.9% | Maroa-Forsyth Community Unit School District 2 / 6,678 |
| 662. | 25.9% | Mascoutah Community Unit School District 19 / 17,438 |
| 663. | 25.8% | Peotone Community Unit School District 207U / 10,989 |
| 664. | 25.8% | Scales Mound Community Unit School District 211 / 1,677 |
| 665. | 25.6% | Somonauk Community Unit School District 432 / 4,873 |
| 666. | 25.6% | Monroe School District 70 / 3,223 |
| 667. | 25.5% | St. Rose School District 14-15 / 1,418 |
| 668. | 25.4% | Edwardsville Community Unit School District 7 / 50,788 |
| 669. | 25.2% | West Lincoln-Broadwell Elementary School District 92 / 4,936 |
| 670. | 25.2% | Itasca School District 10 / 8,919 |
| 671. | 25.2% | Coal City Community Unit School District 1 / 11,429 |
| 672. | 25.1% | Belvidere Consolidated Unit School District 100 / 45,024 |
| 673. | 25.1% | Plano Community Unit School District 88 / 10,772 |
| 674. | 25.0% | Albers School District 63 / 1,510 |
| 675. | 24.9% | Sandwich Community Unit School District 430 / 14,250 |
| 676. | 24.8% | Farrington Community Consolidated School District 99 / 595 |
| 677. | 24.7% | Community Unit School District 16 / 5,756 |
| 678. | 24.6% | Chicago Ridge School District 127-5 / 13,160 |
| 679. | 24.6% | Rosemont Elementary School District 78 / 2,318 |
| 679. | 24.6% | Morton Community Unit School District 709 / 19,001 |
| 681. | 24.5% | St. Joseph-Ogden Community High School District 305 / 7,859 |
| 682. | 24.3% | Montmorency Community Consolidated School District 145 / 2,521 |
| 683. | 24.3% | Bismarck-Henning Consolidated Unit School District / 4,747 |
| 684. | 24.2% | Antioch Community High School District 117 / 44,846 |
| 685. | 24.2% | Waterloo Community Unit School District 5 / 17,334 |
| 686. | 24.1% | Grant Community High School District 124 / 36,070 |
| 686. | 24.1% | Carbondale Elementary School District 95 / 27,892 |
| 688. | 24.1% | Round Lake Community Unit School District 116 / 36,332 |
| 689. | 24.1% | Thompsonville Community Unit School District 174 / 2,159 |
| 690. | 23.9% | Waltonville Community Unit School District 1 / 1,988 |
| 691. | 23.9% | McHenry Community Consolidated School District 15 / 43,205 |
| 692. | 23.8% | Hampton School District 29 / 2,419 |
| 693. | 23.7% | Carterville Community Unit School District 5 / 11,344 |
| 694. | 23.7% | Bethel School District 82 / 1,024 |
| 695. | 23.5% | Palos Heights School District 128 / 9,820 |
| 696. | 23.4% | Community Unit School District 200 / 78,818 |
| 697. | 23.3% | Community High School District 94 / 41,209 |
| 698. | 23.2% | Willow Springs School District 108 / 3,221 |
| 699. | 23.1% | Meridian Community Unit School District 223 / 8,847 |
| 700. | 23.1% | Mundelein Consolidated High School District 120 / 42,938 |
| 701. | 22.9% | Opdyke-Belle Rive Community Consolidated School District 5 / 1,902 |
| 702. | 22.8% | Wauconda Community Unit School District 118 / 26,997 |
| 703. | 22.8% | Carbondale Community High School District 165 / 37,413 |
| 704. | 22.7% | Field Community Consolidated School District 3 / 2,688 |
| 705. | 22.6% | Valmeyer Community Unit School District 3 / 2,645 |
| 706. | 22.6% | Township High School District 214 / 251,753 |
| 707. | 22.6% | Crete-Monee Community Unit School District 201-U / 33,416 |
| 707. | 22.6% | Barrington Community Unit School District 220 / 44,632 |
| 709. | 22.5% | Indian Springs School District 109 / 24,784 |
| 710. | 21.9% | School District U-46 / 232,134 |
| 711. | 21.9% | Millstadt Consolidated Community School District 160 / 8,886 |
| 712. | 21.8% | Batavia Unit School District 101 / 32,091 |
| 713. | 21.8% | Winfield School District 34 / 4,102 |
| 713. | 21.8% | Lick Creek Community Consolidated School District 16 / 1,351 |
| 715. | 21.7% | Byron Community Unit School District 226 / 8,045 |
| 716. | 21.5% | Bartelso School District 57 / 1,285 |
| 717. | 21.4% | Aviston School District 21 / 2,611 |
| 718. | 21.4% | Smithton Community Consolidated School District 130 / 4,206 |
| 719. | 21.4% | St. Joseph Community Consolidated School District 169 / 5,828 |
| 720. | 21.3% | Matteson Elementary School District 162 / 25,116 |
| 721. | 21.2% | Rome Community Consolidated School District 2 / 2,412 |
| 722. | 21.2% | Selmaville Community Consolidated School District 10 / 2,015 |
| 723. | 21.0% | Bradley-Bourbonnais Consolidated High School District 307 / 39,772 |
| 724. | 20.9% | Nettle Creek Community Consolidated School District 24C / 805 |
| 725. | 20.8% | Alsip-Hazelgreen-Oaklawn School District 126 / 17,939 |
| 726. | 20.5% | Lockport Township High School District 205 / 75,533 |
| 727. | 20.4% | Lisle Community Unit School District 202 / 13,968 |
| 728. | 20.2% | Geneva Community Unit School District 304 / 29,710 |
| 729. | 20.2% | Mount Zion Community Unit School District 3 / 12,101 |
| 729. | 20.2% | Glenbard Township High School District 87 / 166,367 |
| 731. | 20.1% | Country Club Hills School District 160 / 12,286 |
| 732. | 19.8% | Brookwood School District 167 / 10,877 |
| 732. | 19.8% | Palos Community Consolidated School District 118 / 23,105 |
| 734. | 19.8% | Germantown Hills School District 69 / 6,225 |
| 735. | 19.8% | Hinsdale Township High School District 86 / 74,930 |
| 736. | 19.8% | Arbor Park School District 145 / 12,560 |
| 737. | 19.7% | Prairie Grove Community School District 46 / 7,685 |
| 738. | 19.3% | McClellan Community Consolidated School District 12 / 955 |
| 739. | 19.1% | Jasper Community Consolidated School District 17 / 1,617 |
| 740. | 18.9% | Rondout School District 72 / 1,633 |
| 741. | 18.8% | Medinah School District 11 / 6,959 |
| 742. | 18.8% | Emmons School District 33 / 3,438 |
| 743. | 18.6% | Columbia Community Unit School District 4 / 12,633 |
| 744. | 18.5% | Pleasant Valley School District 62 / 4,937 |
| 745. | 18.4% | Lake Villa Community Consolidated School District 41 / 23,252 |
| 746. | 18.4% | Triad Community Unit School District 2 / 21,111 |
| 747. | 18.4% | Lemont-Bromberek Combined School District 113A / 25,042 |
| 748. | 18.2% | Addison School District 4 / 38,048 |
| 749. | 18.2% | Lemont Township High School District 210 / 25,392 |
| 750. | 18.2% | Unity Point Community Consolidated School District 140 / 5,256 |
| 751. | 18.2% | Raccoon Consolidated School District 1 / 2,245 |
| 752. | 18.1% | South Holland School District 150 / 10,277 |
| 753. | 18.0% | Community High School District 155 / 96,837 |
| 754. | 17.7% | Rankin Community School District 98 / 3,279 |
| 755. | 17.3% | Community Consolidated School District 146 / 26,189 |
| 756. | 17.2% | Manteno Community Unit School District 5 / 12,188 |
| 757. | 17.2% | Community Unit School District 300 / 109,175 |
| 758. | 16.9% | Woodlawn Community High School District 205 / 3,271 |
| 759. | 16.8% | Williamsville Community Unit School District 15 / 7,589 |
| 759. | 16.8% | Riverton Community Unit School District 14 / 8,069 |
| 761. | 16.8% | Forest Ridge School District 142 / 17,211 |
| 762. | 16.7% | Gower School District 62 / 9,784 |
| 763. | 16.6% | Crystal Lake Community Consolidated School District 47 / 62,181 |
| 764. | 16.5% | Woodlawn Community Consolidated School District 4 / 2,678 |
| 765. | 16.3% | Cary Community Consolidated School District 26 / 22,506 |
| 766. | 16.2% | Community High School District 99 / 109,533 |
| 767. | 16.1% | Dodds Community Consolidated School District 7 / 1,490 |
| 768. | 15.7% | Rockton School District 140 / 12,263 |
| 769. | 15.7% | Pontiac-William Holliday School District 105 / 8,308 |
| 770. | 15.6% | Community Consolidated School District 59 / 66,361 |
| 771. | 15.6% | Miller Township Community Consolidated School District / 2,192 |
| 772. | 15.4% | Mahomet-Seymour Community Unit School District 3 / 13,899 |
| 773. | 15.2% | Kaneland Community Unit School District 302 / 25,299 |
| 774. | 15.1% | Palatine Community Consolidated School District 15 / 118,761 |
| 775. | 14.8% | Lake Park Community High School District 108 / 50,328 |
| 776. | 14.7% | Pleasantdale School District 107 / 7,984 |
| 777. | 14.5% | Richmond-Burton Community High School District 157 / 11,628 |
| 777. | 14.5% | Nippersink School District 2 / 11,628 |
| 779. | 14.4% | O'Fallon Community Consolidated School District 90 / 28,189 |
| 779. | 14.4% | Gurnee School District 56 / 18,066 |
| 781. | 14.3% | Mokena School District 159 / 17,167 |
| 782. | 14.1% | Big Hollow School District 38 / 14,983 |
| 783. | 14.0% | St. Charles Community Unit School District 303 / 68,196 |
| 784. | 14.0% | West Northfield School District 31 / 9,767 |
| 785. | 13.9% | Reed Custer Community Unit School District 255U / 9,369 |
| 785. | 13.9% | Giant City Community Consolidated School District 130 / 2,356 |
| 787. | 13.9% | O'Fallon Township High School District 203 / 39,357 |
| 788. | 13.8% | Pleasant Plains Community Unit School District 8 / 8,112 |
| 789. | 13.7% | Prospect Heights School District 23 / 18,620 |
| 790. | 13.4% | Grayslake Consolidated Community School District 46 / 30,032 |
| 791. | 13.4% | Lake Zurich Community Unit School District 95 / 31,940 |
| 792. | 13.2% | North Palos School District 117 / 28,460 |
| 793. | 13.2% | Wallace Community Consolidated School District 195 / 2,858 |
| 794. | 13.2% | Grayslake Community High School District 127 / 44,111 |
| 795. | 13.1% | Libertyville Community High School District 128 / 49,998 |
| 796. | 12.8% | Riley Community Consolidated School District 18 / 3,638 |
| 797. | 12.8% | Rochester Community Unit School District 3A / 10,343 |
| 798. | 12.5% | Central Community Unit School District 301 / 17,228 |
| 799. | 12.3% | Yorkville Community Unit School District 115 / 27,998 |
| 799. | 12.3% | River Trails School District 26 / 16,282 |
| 801. | 12.3% | Beach Park Community Consolidated School District 3 / 20,556 |
| 801. | 12.3% | Hononegah Community High School District 207 / 32,082 |
| 803. | 12.2% | Grand Prairie Community Consolidated School District 6 / 860 |
| 804. | 12.1% | Central School District 104 / 5,033 |
| 805. | 11.9% | McLean County Unit School District 5 / 94,106 |
| 806. | 11.6% | Darien School District 61 / 15,844 |
| 807. | 11.5% | Community Consolidated School District 180 / 6,850 |
| 808. | 11.4% | Queen Bee School District 16 / 17,277 |
| 809. | 11.2% | Wheeling Community Consolidated School District 21 / 65,194 |
| 810. | 11.1% | Glen Ellyn Community Consolidated School District 89 / 22,302 |
| 811. | 11.0% | Northbrook Elementary School District 27 / 10,687 |
| 812. | 10.6% | Maercker School District 60 / 17,959 |
| 813. | 10.5% | Naperville Community Unit District 203 / 95,161 |
| 814. | 10.4% | Bourbonnais School District 53 / 23,743 |
| 815. | 10.3% | Goreville Community Unit School District 1 / 3,411 |
| 816. | 10.3% | Shiloh Village School District 85 / 4,769 |
| 817. | 10.0% | Northbrook/Glenview School District 30 / 10,753 |
| 818. | 10.0% | Consolidated High School District 230 / 154,708 |
| 819. | 9.8% | Warren Township High School District 121 / 68,254 |
| 820. | 9.7% | Butler School District 53 / 4,467 |
| 821. | 9.5% | Manhattan School District 114 / 9,169 |
| 822. | 9.3% | New Lenox School District 122 / 38,681 |
| 823. | 9.1% | Sunnybrook School District 171 / 10,810 |
| 824. | 9.1% | Wolf Branch School District 113 / 7,660 |
| 825. | 9.1% | Township High School District 211 / 235,114 |
| 826. | 9.0% | Channahon School District 17 / 10,249 |
| 826. | 9.0% | Lincolnshire-Prairieview School District 103 / 12,991 |
| 828. | 9.0% | Lincoln Way Community High School District 210 / 103,957 |
| 829. | 8.9% | Cass School District 63 / 8,627 |
| 830. | 8.4% | Ball-Chatham Community Unit School District 5 / 26,839 |
| 831. | 8.4% | Saratoga Community Consolidated School District 60C / 6,039 |
| 832. | 8.2% | Kinnikinnick Community Consolidated School District 131 / 13,414 |
| 833. | 8.1% | Marquardt School District 15 / 26,404 |
| 834. | 8.1% | Prairie Hill Community Consolidated School District 133 / 5,052 |
| 835. | 7.7% | Millburn Community Consolidated School District 24 / 9,082 |
| 836. | 7.6% | Sandridge School District 172 / 4,641 |
| 837. | 7.6% | Woodland Community Consolidated School District 50 / 50,516 |
| 838. | 7.2% | Richland School District 88A / 10,078 |
| 839. | 7.2% | Frankfort Community Consolidated School District 157C / 17,619 |
| 840. | 7.1% | Schaumburg Community Consolidated School District 54 / 132,967 |
| 841. | 7.1% | Central School District 51 / 7,948 |
| 842. | 7.1% | Valley View Community Unit School District 365U / 91,972 |
| 843. | 7.0% | Bloomingdale School District 13 / 13,287 |
| 844. | 7.0% | Troy Community Consolidated School District 30C / 35,666 |
| 845. | 6.7% | Oswego Community Unit School District 308 / 74,841 |
| 846. | 6.4% | Community Consolidated School District 93 / 35,814 |
| 847. | 6.4% | Whiteside School District 115 / 12,526 |
| 848. | 6.3% | Benjamin School District 25 / 6,264 |
| 848. | 6.3% | Dunlap Community Unit School District 323 / 20,345 |
| 850. | 6.1% | Orland School District 135 / 54,404 |
| 851. | 6.1% | Woodridge School District 68 / 32,321 |
| 852. | 5.7% | Oak Grove School District 68 / 7,184 |
| 853. | 5.1% | Plainfield School District 202 / 120,416 |
| 854. | 5.1% | Minooka Community High School District 111 / 37,729 |
| 855. | 5.0% | Fremont School District 79 / 19,584 |
| 856. | 4.7% | St. George Community Consolidated School District 258 / 3,341 |
| 857. | 4.6% | Summit Hill School District 161 / 23,236 |
| 858. | 4.5% | Keeneyville School District 20 / 14,153 |
| 859. | 4.5% | Elementary School District 159 / 19,419 |
| 860. | 4.3% | Adlai E. Stevenson High School District 125 / 60,968 |
| 861. | 4.2% | Kirby School District 140 / 35,803 |
| 862. | 4.0% | Huntley Consolidated School District 158 / 42,346 |
| 863. | 3.7% | Center Cass School District 66 / 11,025 |
| 864. | 3.7% | Kildeer Countryside Community Consolidated School District 96 / 22,875 |
| 865. | 3.6% | Homer Community Consolidated School District 33C / 29,811 |
| 866. | 3.5% | Minooka Community Consolidated School District 201 / 23,438 |
| 867. | 3.2% | Hawthorn Community Consolidated School District 73 / 30,381 |
| 868. | 2.9% | Aptakisic-Tripp Community Consolidated School District / 18,655 |
| 869. | 2.1% | Indian Prairie Community Unit School District 204 / 126,881 |
Please note that we only rank locations with 'House Built in 1959 or Earlier Percentage' data. The rank above might not be a complete list. Locations without 'House Built in 1959 or Earlier Percentage' data are not listed.
*ACS stands for U.S. Census American Community Survey. According to the U.S. Census, if the date is a range, you can interpret the data as an average of the period of time.
