| Rank | Median Age ▲ | School District / Population |
| 1. | 22.90 | North Chicago School District 187 / 31,655 |
| 2. | 23.30 | Charleston Community Unit School District 1 / 28,363 |
| 3. | 23.40 | Carbondale Elementary School District 95 / 27,628 |
| 4. | 23.70 | DeKalb Community Unit School District 428 / 51,421 |
| 4. | 23.70 | Macomb Community Unit School District 185 / 22,685 |
| 6. | 24.70 | Carbondale Community High School District 165 / 37,283 |
| 7. | 24.90 | Urbana School District 116 / 50,537 |
| 8. | 26.60 | Ford Heights School District 169 / 2,858 |
| 9. | 26.70 | Champaign Community Unit School District 4 / 91,656 |
| 9. | 26.70 | General George Patton School District 133 / 2,352 |
| 11. | 27.10 | Cicero School District 99 / 83,332 |
| 12. | 28.10 | Carbon Cliff-Barstow School District 36 / 1,915 |
| 13. | 28.30 | McLean County Unit School District 5 / 91,069 |
| 14. | 28.90 | Community Consolidated School District 168 / 10,243 |
| 15. | 29.00 | Rhodes School District 84-5 / 4,867 |
| 16. | 29.10 | Aurora East Unit School District 131 / 77,437 |
| 16. | 29.10 | Mascoutah Community Unit School District 19 / 16,984 |
| 18. | 29.20 | Round Lake Community Unit School District 116 / 35,961 |
| 19. | 29.40 | Chicago Heights School District 170 / 24,842 |
| 20. | 29.60 | Unity Point Community Consolidated School District 140 / 5,451 |
| 20. | 29.60 | J. Sterling Morton High School District 201 / 157,034 |
| 22. | 29.80 | Arthur Community Unit School District 305 / 6,064 |
| 22. | 29.80 | Cahokia Community Unit School District 187 / 19,834 |
| 24. | 29.90 | Harvey School District 152 / 16,264 |
| 25. | 30.20 | Dolton School District 148 / 23,169 |
| 26. | 30.50 | West Harvey-Dixmoor Public School District 147 / 11,533 |
| 26. | 30.50 | Creston Community Consolidated School District 161 / 1,120 |
| 28. | 30.60 | Berwyn North School District 98 / 23,819 |
| 29. | 30.70 | Depue Community Unit School District 103 / 2,199 |
| 30. | 30.80 | Central Stickney School District 110 / 2,926 |
| 31. | 30.90 | Waukegan Community Unit School District 60 / 84,428 |
| 31. | 30.90 | Summit School District 104 / 12,164 |
| 33. | 31.00 | Zion Elementary School District 6 / 17,360 |
| 34. | 31.20 | Taft School District 90 / 3,636 |
| 34. | 31.20 | Plano Community Unit School District 88 / 9,943 |
| 36. | 31.40 | Lincoln Elementary School District 156 / 7,139 |
| 37. | 31.50 | Joliet Public School District 86 / 86,698 |
| 38. | 31.60 | Bellwood School District 88 / 23,181 |
| 39. | 31.80 | Chester-East Lincoln Community Csd 61 / 3,298 |
| 40. | 32.10 | Oswego Community Unit School District 308 / 68,241 |
| 41. | 32.20 | Plainfield School District 202 / 112,788 |
| 41. | 32.20 | Marquardt School District 15 / 26,435 |
| 43. | 32.30 | Valley View Community Unit School District 365U / 91,548 |
| 44. | 32.40 | Tamaroa School District 5 / 1,220 |
| 45. | 32.50 | Manhattan School District 114 / 9,151 |
| 46. | 32.70 | Bloom Township High School District 206 / 64,197 |
| 47. | 32.80 | Central School District 104 / 4,923 |
| 48. | 32.90 | Minooka Community Consolidated School District 201 / 20,814 |
| 49. | 33.00 | Chicago Ridge School District 127-5 / 13,039 |
| 49. | 33.00 | Joliet Township High School District 204 / 129,911 |
| 49. | 33.00 | Chicago Public School District 299 / 2,703,477 |
| 52. | 33.10 | Indian Prairie Community Unit School District 204 / 125,546 |
| 52. | 33.10 | West Chicago School District 33 / 30,575 |
| 54. | 33.30 | Big Hollow School District 38 / 13,777 |
| 54. | 33.30 | Harvard Community Unit School District 50 / 13,421 |
| 54. | 33.30 | Ohio Community High School District 505 / 935 |
| 57. | 33.40 | Signal Hill School District 181 / 3,325 |
| 58. | 33.50 | Ohio Community Consolidated School District 17 / 936 |
| 59. | 33.60 | Bloomington School District 87 / 44,792 |
| 59. | 33.60 | School District U-46 / 227,274 |
| 59. | 33.60 | Keeneyville School District 20 / 13,914 |
| 62. | 33.70 | East St. Louis School District 189 / 39,557 |
| 62. | 33.70 | Berkeley School District 87 / 21,730 |
| 62. | 33.70 | Community Consolidated School District 180 / 6,550 |
| 65. | 33.80 | Maywood-Melrose Park-Broadview School District 89 / 44,278 |
| 65. | 33.80 | Thomasboro Community Consolidated School District 130 / 2,464 |
| 65. | 33.80 | Thornton Township High School District 205 / 116,702 |
| 68. | 33.90 | Berwyn South School District 100 / 31,765 |
| 68. | 33.90 | Kankakee School District 111 / 33,072 |
| 70. | 34.00 | Argo Community High School District 217 / 39,269 |
| 70. | 34.00 | Aurora West Unit School District 129 / 77,301 |
| 70. | 34.00 | Peoria School District 150 / 101,590 |
| 70. | 34.00 | Arcola Consolidated Unit School District 306 / 4,358 |
| 70. | 34.00 | Grayslake Consolidated Community School District 46 / 29,684 |
| 75. | 34.10 | Indian Springs School District 109 / 23,923 |
| 75. | 34.10 | Sandridge School District 172 / 4,410 |
| 77. | 34.20 | Braceville School District 75 / 1,452 |
| 77. | 34.20 | Bourbonnais School District 53 / 23,247 |
| 77. | 34.20 | Schiller Park School District 81 / 12,817 |
| 80. | 34.30 | Minooka Community High School District 111 / 35,370 |
| 80. | 34.30 | Teutopolis Community Unit School District 50 / 5,420 |
| 80. | 34.30 | Bartelso School District 57 / 1,226 |
| 83. | 34.40 | Bradley-Bourbonnais Consolidated High School District 307 / 38,851 |
| 83. | 34.40 | Addison School District 4 / 37,158 |
| 83. | 34.40 | Community Consolidated School District 93 / 34,289 |
| 86. | 34.50 | Leyden Community High School District 212 / 63,851 |
| 86. | 34.50 | Community Consolidated School District 204 / 4,182 |
| 86. | 34.50 | Mannheim School District 83 / 21,696 |
| 86. | 34.50 | Bradley School District 61 / 12,367 |
| 86. | 34.50 | Valmeyer Community Unit School District 3 / 2,938 |
| 91. | 34.60 | Genoa-Kingston Community Unit School District 424 / 9,100 |
| 92. | 34.70 | Edwardsville Community Unit School District 7 / 50,001 |
| 92. | 34.70 | Hazel Crest School District 152-5 / 8,161 |
| 92. | 34.70 | St. George Community Consolidated School District 258 / 3,237 |
| 95. | 34.80 | Posen-Robbins Elementary School District 143-5 / 11,656 |
| 95. | 34.80 | Dolton School District 149 / 27,594 |
| 97. | 34.90 | St. Rose School District 14-15 / 1,205 |
| 97. | 34.90 | Community Unit School District 300 / 107,834 |
| 99. | 35.00 | Community High School District 94 / 40,762 |
| 99. | 35.00 | Creve Coeur School District 76 / 5,909 |
| 99. | 35.00 | Diamond Lake School District 76 / 8,598 |
| 99. | 35.00 | Lyons School District 103 / 22,451 |
| 103. | 35.10 | Franklin Park School District 84 / 10,955 |
| 103. | 35.10 | Bensenville School District 2 / 19,485 |
| 105. | 35.20 | Pecatonica Community Unit School District 321 / 5,293 |
| 105. | 35.20 | Zion-Benton Township High School District 126 / 44,495 |
| 107. | 35.30 | Yorkville Community Unit School District 115 / 26,231 |
| 107. | 35.30 | Liberty Community Unit School District 2 / 3,463 |
| 107. | 35.30 | Dunlap Community Unit School District 323 / 19,107 |
| 107. | 35.30 | Grayslake Community High School District 127 / 43,357 |
| 111. | 35.40 | Midlothian School District 143 / 14,884 |
| 111. | 35.40 | Troy Community Consolidated School District 30C / 36,322 |
| 111. | 35.40 | Prairie-Hills Elementary School District 144 / 22,015 |
| 114. | 35.50 | Gurnee School District 56 / 17,153 |
| 114. | 35.50 | Millburn Community Consolidated School District 24 / 8,993 |
| 114. | 35.50 | Warren Township High School District 121 / 67,701 |
| 114. | 35.50 | Lake Villa Community Consolidated School District 41 / 22,475 |
| 114. | 35.50 | South Wilmington Consolidated School District 74 / 786 |
| 114. | 35.50 | Hawthorn Community Consolidated School District 73 / 29,745 |
| 114. | 35.50 | Belvidere Consolidated Unit School District 100 / 44,786 |
| 114. | 35.50 | Reavis Township High School District 220 / 32,530 |
| 122. | 35.60 | Proviso Township High School District 209 / 126,153 |
| 122. | 35.60 | Pleasant Valley School District 62 / 4,397 |
| 122. | 35.60 | Colona School District 190 / 4,169 |
| 122. | 35.60 | Summit Hill School District 161 / 22,534 |
| 122. | 35.60 | Mundelein Consolidated High School District 120 / 41,133 |
| 122. | 35.60 | Cook County School District 130 / 29,252 |
| 122. | 35.60 | Eureka Community Unit District 140 / 9,638 |
| 122. | 35.60 | Grant Park Community Unit School District 6 / 3,382 |
| 130. | 35.70 | Monmouth-Roseville Community Unit School District 238 / 11,091 |
| 130. | 35.70 | Woodland Community Consolidated School District 50 / 51,177 |
| 130. | 35.70 | Evanston Community Consolidated School District 65 / 81,872 |
| 130. | 35.70 | South Holland School District 151 / 13,733 |
| 130. | 35.70 | Evanston Township High School District 202 / 81,872 |
| 130. | 35.70 | Rochelle Community Consolidated District 231 / 13,686 |
| 136. | 35.80 | Homer Community Consolidated School District 33C / 29,362 |
| 136. | 35.80 | Bartonville School District 66 / 2,112 |
| 136. | 35.80 | Laraway Community Consolidated School District 70C / 3,393 |
| 136. | 35.80 | Marengo-Union Elementary Consolidated District 165 / 10,480 |
| 136. | 35.80 | Whiteside School District 115 / 12,809 |
| 136. | 35.80 | Sycamore Community Unit School District 427 / 21,820 |
| 142. | 35.90 | Queen Bee School District 16 / 17,414 |
| 142. | 35.90 | New Simpson Hill Consolidated District 32 / 3,182 |
| 142. | 35.90 | Bremen Community High School District 228 / 93,470 |
| 142. | 35.90 | Kaneland Community Unit School District 302 / 25,110 |
| 146. | 36.00 | Thornton Fractional Township High School District 215 / 59,426 |
| 146. | 36.00 | Pontiac-William Holliday School District 105 / 8,048 |
| 146. | 36.00 | Rossville-Alvin Community Unit School District 7 / 2,322 |
| 146. | 36.00 | Arbor Park School District 145 / 12,424 |
| 146. | 36.00 | Cary Community Consolidated School District 26 / 22,076 |
| 146. | 36.00 | Rochelle Township High School District 212 / 17,552 |
| 146. | 36.00 | St. Joseph Community Consolidated School District 169 / 5,887 |
| 153. | 36.10 | Fenton Community High School District 100 / 29,893 |
| 153. | 36.10 | Grant Community High School District 124 / 35,277 |
| 153. | 36.10 | Central School District 51 / 6,993 |
| 156. | 36.20 | Vienna School District 55 / 5,124 |
| 156. | 36.20 | Mahomet-Seymour Community Unit School District 3 / 13,793 |
| 156. | 36.20 | Burbank School District 111 / 29,604 |
| 156. | 36.20 | Palatine Community Consolidated School District 15 / 117,475 |
| 156. | 36.20 | O'Fallon Community Consolidated School District 90 / 26,811 |
| 156. | 36.20 | Donovan Community Unit School District 3 / 2,563 |
| 162. | 36.30 | Carterville Community Unit School District 5 / 10,959 |
| 162. | 36.30 | New Lenox School District 122 / 38,008 |
| 162. | 36.30 | Calumet Public School District 132 / 11,474 |
| 165. | 36.40 | North Boone Community Unit School District 200 / 8,299 |
| 165. | 36.40 | North Pekin-Marquette Heights School District 102 / 5,168 |
| 165. | 36.40 | South Fork School District 14 / 2,583 |
| 165. | 36.40 | Bannockburn School District 106 / 2,015 |
| 165. | 36.40 | Woodridge School District 68 / 32,135 |
| 165. | 36.40 | Calumet City School District 155 / 11,022 |
| 171. | 36.50 | O'Fallon Township High School District 203 / 37,866 |
| 171. | 36.50 | Waltonville Community Unit School District 1 / 2,208 |
| 173. | 36.60 | Community Unit School District 200 / 78,853 |
| 173. | 36.60 | Central Community Unit School District 301 / 17,009 |
| 173. | 36.60 | West Lincoln-Broadwell Elementary School District 92 / 5,537 |
| 173. | 36.60 | McHenry Community Consolidated School District 15 / 42,090 |
| 173. | 36.60 | Township High School District 211 / 232,811 |
| 173. | 36.60 | Glenbard Township High School District 87 / 164,804 |
| 173. | 36.60 | McHenry Community High School District 156 / 45,205 |
| 173. | 36.60 | Schaumburg Community Consolidated School District 54 / 132,253 |
| 181. | 36.70 | District 50 Schools / 7,812 |
| 182. | 36.80 | Beach Park Community Consolidated School District 3 / 20,497 |
| 183. | 36.90 | Crystal Lake Community Consolidated School District 47 / 61,959 |
| 183. | 36.90 | South Beloit Community Unit School District 320 / 6,562 |
| 183. | 36.90 | Chaney-Monge School District 88 / 6,168 |
| 183. | 36.90 | Wood River-Hartford Elementary School District 15 / 6,306 |
| 183. | 36.90 | Hiawatha Community Unit School District 426 / 3,334 |
| 188. | 37.00 | Meridian Community Unit School District 223 / 8,875 |
| 188. | 37.00 | Central Community Unit School District 4 / 6,939 |
| 188. | 37.00 | DuPage High School District 88 / 81,353 |
| 188. | 37.00 | Maroa-Forsyth Community Unit School District 2 / 6,762 |
| 188. | 37.00 | Vienna High School District 133 / 9,730 |
| 188. | 37.00 | Woodstock Community Unit School District 200 / 37,718 |
| 188. | 37.00 | Kinnikinnick Community Consolidated School District 131 / 13,496 |
| 188. | 37.00 | St. Elmo Community Unit School District 202 / 3,244 |
| 188. | 37.00 | Prairie du Rocher Community Consolidated School District 134 / 868 |
| 188. | 37.00 | Jasper Community Consolidated School District 17 / 1,555 |
| 188. | 37.00 | Chester Non-High School District 122 / 868 |
| 188. | 37.00 | Belleville School District 118 / 37,204 |
| 188. | 37.00 | Lincoln Way Community High School District 210 / 103,065 |
| 201. | 37.10 | Mundelein Elementary School District 75 / 15,441 |
| 201. | 37.10 | Coal City Community Unit School District 1 / 11,258 |
| 203. | 37.20 | Community High School District 155 / 95,975 |
| 203. | 37.20 | Opdyke-Belle Rive Community Consolidated School District 5 / 1,914 |
| 203. | 37.20 | Roxana Community Unit School District 1 / 12,394 |
| 203. | 37.20 | Medinah School District 11 / 6,821 |
| 203. | 37.20 | Marengo Community High School District 154 / 13,969 |
| 203. | 37.20 | Lansing School District 158 / 22,671 |
| 209. | 37.30 | Channahon School District 17 / 10,195 |
| 209. | 37.30 | Albers School District 63 / 1,354 |
| 209. | 37.30 | Tolono Community Unit School District 7 / 9,744 |
| 209. | 37.30 | Buncombe Consolidated School District 43 / 523 |
| 209. | 37.30 | Rantoul City School District 137 / 12,268 |
| 209. | 37.30 | Forest Ridge School District 142 / 17,479 |
| 209. | 37.30 | Rantoul Township High School District 193 / 17,357 |
| 209. | 37.30 | Washington Community High School District 308 / 22,678 |
| 217. | 37.40 | Wauconda Community Unit School District 118 / 26,822 |
| 217. | 37.40 | Cowden-Herrick Community Unit School District 3A / 2,424 |
| 217. | 37.40 | Auburn Community Unit School District 10 / 6,921 |
| 217. | 37.40 | Webber Township High School District 204 / 3,025 |
| 217. | 37.40 | Danville Community Consolidated School District 118 / 40,476 |
| 217. | 37.40 | Antioch Community Consolidated School District 34 / 22,199 |
| 223. | 37.50 | Community Consolidated School District 59 / 65,516 |
| 223. | 37.50 | Seneca Community Consolidated School District 170 / 3,659 |
| 223. | 37.50 | Rockford School District 205 / 194,568 |
| 223. | 37.50 | Evergreen Park Community High School District 231 / 19,815 |
| 223. | 37.50 | Saunemin Community Consolidated School District 438 / 1,002 |
| 223. | 37.50 | Orangeville Community Unit School District 203 / 2,870 |
| 223. | 37.50 | Evergreen Park Elementary School District 124 / 19,815 |
| 223. | 37.50 | Villa Park School District 45 / 35,059 |
| 223. | 37.50 | De Soto Consolidated School District 86 / 1,860 |
| 232. | 37.60 | Belle Valley School District 119 / 8,611 |
| 232. | 37.60 | Rockdale School District 84 / 2,132 |
| 232. | 37.60 | Brown County Community Unit School District 1 / 6,896 |
| 232. | 37.60 | Lockport Township High School District 205 / 74,398 |
| 232. | 37.60 | New Hope Community Consolidated School District 6 / 1,689 |
| 232. | 37.60 | Manteno Community Unit School District 5 / 12,119 |
| 232. | 37.60 | Dupo Community Unit School District 196 / 7,368 |
| 232. | 37.60 | Carlyle Community Unit School District 1 / 10,418 |
| 232. | 37.60 | Collinsville Community Unit School District 10 / 47,733 |
| 241. | 37.70 | Kewanee Community Unit School District 229 / 10,284 |
| 241. | 37.70 | Illini Bluffs Community Unit School District 327 / 5,538 |
| 241. | 37.70 | Glen Ellyn School District 41 / 29,865 |
| 241. | 37.70 | Wheeling Community Consolidated School District 21 / 65,346 |
| 241. | 37.70 | Park Forest School District 163 / 15,864 |
| 246. | 37.80 | Ina Community Consolidated School District 8 / 3,199 |
| 246. | 37.80 | Pinckneyville Community High School District 101 / 11,240 |
| 246. | 37.80 | Will County School District 92 / 14,473 |
| 246. | 37.80 | Madison Community Unit School District 12 / 4,929 |
| 246. | 37.80 | Ball-Chatham Community Unit School District 5 / 26,074 |
| 246. | 37.80 | Lincoln Community High School District 404 / 22,908 |
| 246. | 37.80 | Wood Dale School District 7 / 10,408 |
| 253. | 37.90 | Trico Community Unit School District 176 / 6,891 |
| 253. | 37.90 | Hononegah Community High School District 207 / 31,142 |
| 253. | 37.90 | Name N/A / 4,750,332 |
| 253. | 37.90 | Cairo Community Unit School District 1 / 3,096 |
| 253. | 37.90 | Gardner-South Wilmington Township High School District / 3,793 |
| 253. | 37.90 | Burnham School District 154-5 / 1,539 |
| 253. | 37.90 | Kell Consolidated School District 2 / 1,185 |
| 260. | 38.00 | Edinburg Community Unit School District 4 / 2,011 |
| 260. | 38.00 | Heyworth Community Unit School District 4 / 4,917 |
| 260. | 38.00 | Kansas Community Unit School District 3 / 1,726 |
| 260. | 38.00 | Herrin Community Unit School District 4 / 16,062 |
| 264. | 38.10 | El Paso-Gridley Community Unit School District 11 / 6,677 |
| 264. | 38.10 | Huntley Consolidated School District 158 / 39,083 |
| 264. | 38.10 | Rosemont Elementary School District 78 / 2,112 |
| 264. | 38.10 | Harrison School District 36 / 3,658 |
| 264. | 38.10 | Bond County Community Unit School District 2 / 14,399 |
| 264. | 38.10 | Steger School District 194 / 13,309 |
| 264. | 38.10 | Virginia Community Unit School District 64 / 2,389 |
| 271. | 38.20 | Mount Vernon School District 80 / 14,075 |
| 271. | 38.20 | Prairie Hill Community Consolidated School District 133 / 4,770 |
| 271. | 38.20 | Pearl City Community Unit School District 200 / 3,020 |
| 271. | 38.20 | Sunnybrook School District 171 / 10,756 |
| 271. | 38.20 | Rockton School District 140 / 11,337 |
| 271. | 38.20 | Lawrence County Community Unit District 20 / 8,771 |
| 271. | 38.20 | Springfield School District 186 / 113,448 |
| 271. | 38.20 | New Athens Community Unit School District 60 / 4,371 |
| 279. | 38.30 | Ewing Northern Community Consolidated District 115 / 1,943 |
| 279. | 38.30 | Chester Community Unit School District 139 / 11,196 |
| 279. | 38.30 | Deer Creek-Mackinaw Community Unit School District 701 / 5,900 |
| 279. | 38.30 | River Forest School District 90 / 11,166 |
| 279. | 38.30 | Earlville Community Unit School District 9 / 2,725 |
| 279. | 38.30 | Tremont Community Unit School District 702 / 4,830 |
| 279. | 38.30 | Seneca Township High School District 160 / 7,361 |
| 279. | 38.30 | Malden Community Consolidated School District 84 / 859 |
| 287. | 38.40 | Antioch Community High School District 117 / 43,455 |
| 287. | 38.40 | St. Joseph-Ogden Community High School District 305 / 7,927 |
| 287. | 38.40 | Kenilworth School District 38 / 2,970 |
| 287. | 38.40 | Jonesboro Community Consolidated School District 43 / 3,132 |
| 287. | 38.40 | Oak Park and River Forest District 200 / 62,592 |
| 287. | 38.40 | Scott-Morgan Consolidated Unit School District 2 / 1,593 |
| 287. | 38.40 | Selmaville Community Consolidated School District 10 / 2,079 |
| 287. | 38.40 | Bluford Community Consolidated School District 114 / 2,894 |
| 287. | 38.40 | Maercker School District 60 / 18,075 |
| 287. | 38.40 | Oak Park Elementary School District 97 / 51,426 |
| 287. | 38.40 | Princeville Community Unit School District 326 / 4,530 |
| 287. | 38.40 | Rock Island School District 41 / 45,098 |
| 299. | 38.50 | Thornton School District 154 / 2,883 |
| 299. | 38.50 | Norwood Elementary School District 63 / 4,523 |
| 299. | 38.50 | Beardstown Community Unit School District 15 / 7,865 |
| 299. | 38.50 | North Greene Unit School District 3 / 6,541 |
| 299. | 38.50 | Annawan Community Unit School District 226 / 2,260 |
| 299. | 38.50 | Roselle School District 12 / 7,331 |
| 305. | 38.60 | St. Charles Community Unit School District 303 / 66,890 |
| 305. | 38.60 | Columbia Community Unit School District 4 / 12,218 |
| 305. | 38.60 | Okaw Valley Community Unit School District 302 / 3,771 |
| 308. | 38.70 | Mazon-Verona-Kinsman Elementary School District 2C / 2,782 |
| 308. | 38.70 | Ridgeland School District 122 / 21,095 |
| 308. | 38.70 | Hoover-Schrum Memorial School District 157 / 7,962 |
| 308. | 38.70 | Morris School District 54 / 12,237 |
| 308. | 38.70 | Shiloh Village School District 85 / 4,786 |
| 308. | 38.70 | Community High School District 218 / 120,793 |
| 314. | 38.80 | Washington School District 52 / 7,873 |
| 314. | 38.80 | Rock Falls Elementary School District 13 / 7,965 |
| 314. | 38.80 | Hutsonville Community Unit School District 1 / 2,189 |
| 314. | 38.80 | United Township High School District 30 / 40,413 |
| 314. | 38.80 | Pleasant Hill School District 69 / 1,992 |
| 314. | 38.80 | LaGrange School District 105 / 12,064 |
| 314. | 38.80 | Panhandle Community Unit School District 2 / 3,394 |
| 314. | 38.80 | Steward Elementary School District 220 / 726 |
| 314. | 38.80 | North Wayne Community Unit School District 200 / 3,092 |
| 314. | 38.80 | Granite City Community Unit School District 9 / 44,580 |
| 324. | 38.90 | Effingham Community Unit School District 40 / 20,506 |
| 324. | 38.90 | Somonauk Community Unit School District 432 / 4,889 |
| 324. | 38.90 | Potomac Community Unit School District 10 / 1,404 |
| 324. | 38.90 | North Palos School District 117 / 27,944 |
| 324. | 38.90 | Johnston City Community Unit School District 1 / 8,074 |
| 324. | 38.90 | Mendota Community Consolidated School District 289 / 10,443 |
| 324. | 38.90 | Hoopeston Area Community Unit School District 11 / 7,280 |
| 324. | 38.90 | Prairie Central Community Unit School District 8 / 11,810 |
| 324. | 38.90 | Matteson Elementary School District 162 / 24,435 |
| 333. | 39.00 | Mendota Township High School District 280 / 10,471 |
| 333. | 39.00 | Elmhurst School District 205 / 46,303 |
| 333. | 39.00 | Lee Center Community Unit School District 271 / 1,638 |
| 333. | 39.00 | Georgetown-Ridge Farm Consolidated Unit School District 4 / 6,831 |
| 333. | 39.00 | Community Consolidated School District 146 / 25,948 |
| 333. | 39.00 | South Pekin School District 137 / 1,974 |
| 333. | 39.00 | Lake Park Community High School District 108 / 50,556 |
| 340. | 39.10 | Brownstown Community Unit School District 201 / 2,435 |
| 340. | 39.10 | Tri-Valley Community Unit School District 3 / 4,514 |
| 340. | 39.10 | Tuscola Community Unit School District 301 / 5,749 |
| 340. | 39.10 | Winnebago Community Unit School District 323 / 7,718 |
| 340. | 39.10 | Altamont Community Unit School District 10 / 4,969 |
| 340. | 39.10 | River Grove School District 85-5 / 7,764 |
| 340. | 39.10 | Jersey Community Unit School District 100 / 20,346 |
| 347. | 39.20 | Gavin School District 37 / 7,405 |
| 347. | 39.20 | Streator Elementary School District 44 / 17,288 |
| 347. | 39.20 | Naperville Community Unit District 203 / 94,500 |
| 347. | 39.20 | Vandalia Community Unit School District 203 / 10,591 |
| 347. | 39.20 | Girard Community Unit School District 3 / 4,184 |
| 347. | 39.20 | Pontiac Community Consolidated School District 429 / 13,690 |
| 347. | 39.20 | Triad Community Unit School District 2 / 20,518 |
| 347. | 39.20 | Harlem Unit School District 122 / 44,885 |
| 347. | 39.20 | Byron Community Unit School District 226 / 7,580 |
| 356. | 39.30 | Alton Community Unit School District 11 / 49,040 |
| 356. | 39.30 | Batavia Unit School District 101 / 31,902 |
| 356. | 39.30 | Moline Unit School District 40 / 48,527 |
| 356. | 39.30 | Marissa Community Unit School District 40 / 3,246 |
| 356. | 39.30 | Belleville Township High School District 201 / 107,228 |
| 356. | 39.30 | Bradford Community Unit School District 1 / 1,752 |
| 356. | 39.30 | Flora Community Unit School District 35 / 8,589 |
| 356. | 39.30 | LaGrange School District 102 / 25,405 |
| 356. | 39.30 | Grand Prairie Community Consolidated School District 6 / 936 |
| 356. | 39.30 | Morris Community High School District 101 / 18,658 |
| 356. | 39.30 | Rankin Community School District 98 / 3,709 |
| 356. | 39.30 | Wesclin Community Unit School District 3 / 7,908 |
| 368. | 39.40 | Lockport School District 91 / 6,655 |
| 368. | 39.40 | Jacksonville School District 117 / 29,109 |
| 368. | 39.40 | Alsip-Hazelgreen-Oaklawn School District 126 / 17,235 |
| 368. | 39.40 | Pontiac Township High School District 90 / 16,352 |
| 368. | 39.40 | Bethalto Consolidated Unit School District 8 / 16,147 |
| 368. | 39.40 | Union School District 81 / 1,597 |
| 368. | 39.40 | Meridian Community Unit School District 15 / 6,318 |
| 368. | 39.40 | Forest Park School District 91 / 14,282 |
| 368. | 39.40 | Galesburg Community Unit School District 205 / 35,351 |
| 368. | 39.40 | Atwood Heights School District 125 / 7,014 |
| 368. | 39.40 | Community Unit School District 16 / 5,490 |
| 368. | 39.40 | Fieldcrest Community Unit School District 6 / 7,397 |
| 380. | 39.50 | Warsaw Community Unit School District 316 / 3,032 |
| 380. | 39.50 | Waltham Community Consolidated School District 185 / 2,331 |
| 380. | 39.50 | Mattoon Community Unit School District 2 / 22,709 |
| 380. | 39.50 | Northwestern Community Unit School District 2 / 2,622 |
| 380. | 39.50 | Rochester Community Unit School District 3A / 10,150 |
| 380. | 39.50 | Nelson Public School District 8 / 391 |
| 380. | 39.50 | Township High School District 214 / 250,143 |
| 380. | 39.50 | Oakwood Community Unit School District 76 / 6,182 |
| 380. | 39.50 | Prophetstown-Lyndon-Tampico Community Unit School District 3 / 5,905 |
| 389. | 39.60 | Geneva Community Unit School District 304 / 28,498 |
| 389. | 39.60 | Gifford Community Consolidated School District 188 / 1,639 |
| 389. | 39.60 | Gibson City-Melvin-Sibley Community Unit School District 5 / 6,136 |
| 389. | 39.60 | Giant City Community Consolidated School District 130 / 2,344 |
| 389. | 39.60 | A-C Central Community Unit School District 262 / 2,747 |
| 389. | 39.60 | Pekin Community High School District 303 / 45,753 |
| 389. | 39.60 | Crete-Monee Community Unit School District 201-U / 33,941 |
| 389. | 39.60 | Central Community High School District 71 / 15,724 |
| 389. | 39.60 | LaSalle Elementary School District 122 / 9,271 |
| 389. | 39.60 | Eswood Community Consolidated District 269 / 960 |
| 389. | 39.60 | Streator Township High School District 40 / 18,882 |
| 389. | 39.60 | Allendale Community Consolidated School District 17 / 1,090 |
| 389. | 39.60 | Lombard School District 44 / 35,368 |
| 402. | 39.70 | East Peoria Community High School District 309 / 26,308 |
| 402. | 39.70 | Lostant Community Unit School District 425 / 792 |
| 402. | 39.70 | Griggsville-Perry Community Unit School District 4 / 2,266 |
| 402. | 39.70 | Elmwood Community Unit School District 322 / 3,921 |
| 402. | 39.70 | Fisher Community Unit School District 1 / 3,081 |
| 402. | 39.70 | Freeburg Community Consolidated School District 70 / 7,390 |
| 402. | 39.70 | Heritage Community Unit School District 8 / 2,757 |
| 409. | 39.80 | Community High School District 99 / 108,862 |
| 409. | 39.80 | East Moline School District 37 / 26,788 |
| 409. | 39.80 | Decatur School District 61 / 72,603 |
| 409. | 39.80 | Cumberland Community Unit School District 77 / 6,611 |
| 409. | 39.80 | Steeleville Community Unit School District 138 / 3,088 |
| 409. | 39.80 | Frankfort Community Unit School District 168 / 12,002 |
| 409. | 39.80 | Germantown Hills School District 69 / 6,399 |
| 409. | 39.80 | Kirby School District 140 / 34,807 |
| 417. | 39.90 | Oakdale Community Consolidated School District 1 / 783 |
| 417. | 39.90 | Tonica Community Consolidated School District 79 / 1,438 |
| 417. | 39.90 | Carlinville Community Unit School District 1 / 9,101 |
| 417. | 39.90 | Breese School District 12 / 6,993 |
| 417. | 39.90 | Metamora Community Consolidated School District 1 / 6,271 |
| 422. | 40.00 | Reed Custer Community Unit School District 255U / 9,316 |
| 422. | 40.00 | Ottawa Elementary School District 141 / 20,036 |
| 422. | 40.00 | Quincy School District 172 / 50,932 |
| 422. | 40.00 | Sandwich Community Unit School District 430 / 14,462 |
| 422. | 40.00 | Aviston School District 21 / 2,349 |
| 422. | 40.00 | Pana Community Unit School District 8 / 9,699 |
| 422. | 40.00 | La Moille Community Unit School District 303 / 2,027 |
| 422. | 40.00 | Des Plaines Community Consolidated School District 62 / 51,568 |
| 430. | 40.10 | Bement Community Unit School District 5 / 2,780 |
| 430. | 40.10 | Shawnee Community Unit School District 84 / 3,248 |
| 430. | 40.10 | Eldorado Community Unit School District 4 / 7,364 |
| 430. | 40.10 | Lake Zurich Community Unit School District 95 / 31,304 |
| 430. | 40.10 | Red Hill Community Unit School District 10 / 8,110 |
| 430. | 40.10 | Saratoga Community Consolidated School District 60C / 5,754 |
| 436. | 40.20 | Murphysboro Community Unit School District 186 / 15,300 |
| 436. | 40.20 | Elmwood Park Community Unit School District 401 / 24,710 |
| 436. | 40.20 | Lovington Community Unit School District 303 / 1,872 |
| 436. | 40.20 | Beecher Community Unit School District 200U / 6,242 |
| 436. | 40.20 | Limestone Community High School District 310 / 22,180 |
| 436. | 40.20 | Rich Township High School District 227 / 67,082 |
| 436. | 40.20 | Sterling Community Unit District 5 / 21,736 |
| 436. | 40.20 | East Alton-Wood River Community High School District 14 / 14,121 |
| 436. | 40.20 | Libertyville Community High School District 128 / 50,156 |
| 445. | 40.30 | Frankfort Community Consolidated School District 157C / 16,911 |
| 445. | 40.30 | Edgar County Community Unit District 6 / 2,264 |
| 445. | 40.30 | Oak Lawn Community High School District 229 / 38,679 |
| 445. | 40.30 | Johnsburg Community Unit School District 12 / 13,084 |
| 445. | 40.30 | Pekin Public School District108 / 33,703 |
| 450. | 40.40 | Marshall Community Unit School District 2C / 8,346 |
| 450. | 40.40 | Red Bud Community Unit School District 132 / 7,620 |
| 450. | 40.40 | Lincoln Elementary School District 27 / 12,934 |
| 450. | 40.40 | Mount Vernon Township High School District 201 / 30,123 |
| 450. | 40.40 | Mokena School District 159 / 17,461 |
| 450. | 40.40 | Westmont Community Unit School District 201 / 12,639 |
| 450. | 40.40 | Lisbon Community Consolidated School District 90 / 804 |
| 450. | 40.40 | Komarek School District 94 / 5,099 |
| 450. | 40.40 | Sandoval Community Unit School District 501 / 2,820 |
| 450. | 40.40 | Joppa-Maple Grove Unit District 38 / 1,520 |
| 460. | 40.50 | Worth School District 127 / 11,083 |
| 460. | 40.50 | Newark Community High School District 18 / 3,320 |
| 460. | 40.50 | Winthrop Harbor School District 1 / 6,638 |
| 460. | 40.50 | Highland Community Unit School District 5 / 17,882 |
| 460. | 40.50 | Oblong Community Unit School District 4 / 3,792 |
| 460. | 40.50 | Silvis School District 34 / 5,347 |
| 466. | 40.60 | Skokie School District 73-5 / 10,048 |
| 466. | 40.60 | Virden Community Unit School District 4 / 5,020 |
| 466. | 40.60 | Centralia School District 135 / 13,771 |
| 466. | 40.60 | Midwest Central Community Unit School District 191 / 6,860 |
| 466. | 40.60 | Prairie Grove Community School District 46 / 7,604 |
| 466. | 40.60 | Ludlow Community Consolidated School District 142 / 1,109 |
| 466. | 40.60 | Fremont School District 79 / 17,415 |
| 473. | 40.70 | Peotone Community Unit School District 207U / 11,003 |
| 473. | 40.70 | Illinois Valley Central Unit School District 321 / 13,582 |
| 473. | 40.70 | Nashville Consolidated Community School District 49 / 5,602 |
| 473. | 40.70 | Southwestern Community Unit School District 9 / 9,397 |
| 473. | 40.70 | Oak Grove School District 68 / 7,475 |
| 473. | 40.70 | Forrestville Valley Community Unit School District 221 / 5,585 |
| 473. | 40.70 | Salem School District 111 / 8,760 |
| 473. | 40.70 | Delavan Community Unit School District 703 / 2,604 |
| 473. | 40.70 | Benjamin School District 25 / 6,237 |
| 473. | 40.70 | Willow Springs School District 108 / 3,358 |
| 483. | 40.80 | Lisle Community Unit School District 202 / 13,379 |
| 483. | 40.80 | Elementary School District 159 / 18,755 |
| 483. | 40.80 | Dixon Unit School District 170 / 22,961 |
| 483. | 40.80 | Newark Community Consolidated School District 66 / 2,235 |
| 483. | 40.80 | Meridian Community Unit School District 101 / 3,511 |
| 483. | 40.80 | East Peoria School District 86 / 18,734 |
| 483. | 40.80 | Nokomis Community Unit School District 22 / 4,731 |
| 490. | 40.90 | Winnetka School District 36 / 11,688 |
| 490. | 40.90 | Miller Township Community Consolidated School District / 2,298 |
| 490. | 40.90 | Staunton Community Unit School District 6 / 8,355 |
| 490. | 40.90 | Spring Valley Community Consolidated School District 99 / 6,029 |
| 490. | 40.90 | Erie Community Unit School District 1 / 3,891 |
| 490. | 40.90 | Le Roy Community Unit School District 2 / 4,413 |
| 490. | 40.90 | Greenview Community Unit School District 200 / 1,687 |
| 490. | 40.90 | Libertyville School District 70 / 18,897 |
| 490. | 40.90 | Dimmick Community Consolidated School District 175 / 1,162 |
| 499. | 41.00 | East Dubuque Community Unit School District 119 / 4,325 |
| 499. | 41.00 | Hinsdale Community Consolidated School District 181 / 25,590 |
| 499. | 41.00 | Lyons Township High School District 204 / 68,205 |
| 499. | 41.00 | Pikeland Community Unit School District 10 / 8,435 |
| 503. | 41.10 | Odell Community Consolidated School District 435 / 1,462 |
| 503. | 41.10 | Metamora Township High School District 122 / 15,545 |
| 503. | 41.10 | Elwood Community Consolidated School District 203 / 3,243 |
| 503. | 41.10 | Pawnee Community Unit School District 11 / 3,144 |
| 503. | 41.10 | Warrensburg-Latham Community Unit District 11 / 6,374 |
| 503. | 41.10 | Salem Community High School District 600 / 15,146 |
| 503. | 41.10 | Harrisburg Community Unit School District 3 / 12,869 |
| 503. | 41.10 | Willow Grove School District 46 / 2,202 |
| 503. | 41.10 | Triopia Community Unit School District 27 / 2,329 |
| 503. | 41.10 | Canton Union School District 66 / 18,029 |
| 503. | 41.10 | ROWVA Community Unit School District 208 / 4,053 |
| 503. | 41.10 | V.I.T. Community Unit School District 2 / 2,518 |
| 515. | 41.20 | Western Springs School District 101 / 9,959 |
| 515. | 41.20 | Grand Ridge Community Consolidated School District 95 / 2,455 |
| 515. | 41.20 | Brookwood School District 167 / 10,312 |
| 515. | 41.20 | Nashville Community High School District 99 / 9,097 |
| 515. | 41.20 | Central A & M Community Unit School District 21 / 4,804 |
| 515. | 41.20 | Central City School District 133 / 2,183 |
| 515. | 41.20 | Oak Grove School District 68 / 3,962 |
| 515. | 41.20 | Flossmoor School District 161 / 22,229 |
| 515. | 41.20 | Westville Community Unit School District 2 / 6,741 |
| 524. | 41.30 | Field Community Consolidated School District 3 / 2,619 |
| 524. | 41.30 | Dwight Common School District 232 / 6,243 |
| 524. | 41.30 | Union Ridge School District 86 / 5,557 |
| 524. | 41.30 | South Central Community Unit School District 401 / 4,398 |
| 524. | 41.30 | Richmond-Burton Community High School District 157 / 11,412 |
| 524. | 41.30 | Clinton Community Unit School District 15 / 12,193 |
| 524. | 41.30 | Abingdon Community Unit School District 217 / 4,177 |
| 524. | 41.30 | Nippersink School District 2 / 11,412 |
| 524. | 41.30 | Wabash Community Unit School District 348 / 11,051 |
| 524. | 41.30 | Skokie School District 69 / 17,748 |
| 524. | 41.30 | Bureau Valley Community Unit School District 340 / 6,834 |
| 524. | 41.30 | Rock Falls Township High School District 301 / 14,610 |
| 524. | 41.30 | LaSalle-Peru Township High School District 120 / 29,191 |
| 524. | 41.30 | Centralia High School District 200 / 21,690 |
| 538. | 41.40 | Lindop School District 92 / 4,110 |
| 538. | 41.40 | Chadwick-Milledgeville Community Unit School District 399 / 3,513 |
| 538. | 41.40 | Benton Consolidated High School District 103 / 12,686 |
| 538. | 41.40 | Freeburg Community High School District 77 / 12,405 |
| 538. | 41.40 | Dwight Township High School District 230 / 6,561 |
| 538. | 41.40 | Williamsville Community Unit School District 15 / 7,209 |
| 538. | 41.40 | Adlai E. Stevenson High School District 125 / 61,457 |
| 538. | 41.40 | Indian Creek Community Unit District 425 / 4,934 |
| 538. | 41.40 | East Alton School District 13 / 7,815 |
| 547. | 41.50 | Kildeer Countryside Community Consolidated School District 96 / 23,238 |
| 547. | 41.50 | Du Quoin Community Unit School District 300 / 9,484 |
| 547. | 41.50 | Fox River Grove Consolidated School District 3 / 4,336 |
| 547. | 41.50 | Country Club Hills School District 160 / 12,204 |
| 547. | 41.50 | Dieterich Community Unit School District 30 / 1,959 |
| 547. | 41.50 | Aptakisic-Tripp Community Consolidated School District / 18,334 |
| 553. | 41.60 | Lowpoint-Washburn Community Unit School District 21 / 2,286 |
| 553. | 41.60 | Benton Community Consolidated School District 47 / 10,066 |
| 553. | 41.60 | Downers Grove Grade School District 58 / 52,817 |
| 553. | 41.60 | Hinckley-Big Rock Community Unit School District 429 / 4,836 |
| 553. | 41.60 | Oglesby Elementary School District 125 / 4,625 |
| 553. | 41.60 | Ottawa Township High School District 140 / 31,903 |
| 553. | 41.60 | Paris-Union School District 95 / 8,539 |
| 553. | 41.60 | Elverado Community Unit School District 196 / 2,986 |
| 561. | 41.70 | Thompsonville Community Unit School District 174 / 1,973 |
| 561. | 41.70 | Glen Ellyn Community Consolidated School District 89 / 21,433 |
| 561. | 41.70 | Ashley Community Consolidated School District 15 / 2,211 |
| 561. | 41.70 | Robein School District 85 / 2,089 |
| 561. | 41.70 | Zeigler-Royalton Community Unit School District 188 / 4,101 |
| 561. | 41.70 | Barrington Community Unit School District 220 / 44,855 |
| 561. | 41.70 | Marseilles Elementary School District 150 / 4,591 |
| 561. | 41.70 | Lebanon Community Unit School District 9 / 5,411 |
| 561. | 41.70 | Pleasant Plains Community Unit School District 8 / 7,778 |
| 561. | 41.70 | Morton Grove School District 70 / 8,702 |
| 571. | 41.80 | Windsor Community Unit School District 1 / 2,533 |
| 571. | 41.80 | Flanagan-Cornell District 74 in Cornell / 978 |
| 571. | 41.80 | Beecher City Community Unit School District 20 / 2,516 |
| 571. | 41.80 | Hamilton County Community Unit School District 10 / 7,757 |
| 571. | 41.80 | Homewood-Flossmoor Community High School District 233 / 38,387 |
| 571. | 41.80 | Christopher Community Unit School District 99 / 4,658 |
| 571. | 41.80 | Cornell Community Consolidated School District 426 / 978 |
| 578. | 41.90 | Litchfield Community Unit School District 12 / 9,051 |
| 578. | 41.90 | Athens Community Unit School District 213 / 5,559 |
| 578. | 41.90 | Bethel School District 82 / 990 |
| 578. | 41.90 | Hall High School District 502 / 9,213 |
| 578. | 41.90 | Tri-City Community Unit School District 1 / 3,064 |
| 578. | 41.90 | Greenfield Community Unit School District 10 / 2,913 |
| 578. | 41.90 | Gardner Community Consolidated School District 72C / 1,562 |
| 578. | 41.90 | Lena-Winslow Community Unit School District 202 / 4,898 |
| 586. | 42.00 | Itasca School District 10 / 8,983 |
| 586. | 42.00 | Polo Community Unit School District 222 / 4,213 |
| 586. | 42.00 | Monticello Community Unit School District 25 / 8,871 |
| 586. | 42.00 | Riverside School District 96 / 13,570 |
| 586. | 42.00 | Waterloo Community Unit School District 5 / 16,904 |
| 586. | 42.00 | Hillsboro Community Unit School District 3 / 13,260 |
| 592. | 42.10 | Massac Unit School District 1 / 13,835 |
| 592. | 42.10 | Marion Community Unit School District 2 / 27,375 |
| 592. | 42.10 | Maine Township High School District 207 / 143,019 |
| 592. | 42.10 | Lexington Community Unit School District 7 / 2,883 |
| 592. | 42.10 | Mount Zion Community Unit School District 3 / 11,951 |
| 592. | 42.10 | Consolidated High School District 230 / 152,081 |
| 592. | 42.10 | Villa Grove Community Unit School District 302 / 4,284 |
| 592. | 42.10 | Jamaica Community Unit School District 12 / 2,361 |
| 592. | 42.10 | Stewardson-Strasburg Community Unit District 5A / 2,792 |
| 592. | 42.10 | Montmorency Community Consolidated School District 145 / 2,524 |
| 602. | 42.20 | Homewood School District 153 / 15,669 |
| 602. | 42.20 | Fox Lake Grade School District 114 / 8,933 |
| 602. | 42.20 | East Maine School District 63 / 45,409 |
| 602. | 42.20 | Galatia Community Unit School District 1 / 2,306 |
| 602. | 42.20 | Deerfield School District 109 / 21,058 |
| 607. | 42.30 | Lemont Township High School District 210 / 24,464 |
| 607. | 42.30 | Riverside Brookfield Township School District 208 / 28,767 |
| 607. | 42.30 | Milford Township High School District 233 / 3,802 |
| 607. | 42.30 | Payson Community Unit School District 1 / 3,569 |
| 607. | 42.30 | Millstadt Consolidated Community School District 160 / 9,209 |
| 607. | 42.30 | Illini Central Community Unit School District 189 / 5,118 |
| 607. | 42.30 | West Richland Community Unit School District 2 / 2,168 |
| 607. | 42.30 | Milford Community Consolidated School District 280 / 3,802 |
| 607. | 42.30 | Olympia Community Unit School District 16 / 11,910 |
| 607. | 42.30 | East Richland Community Unit School District 1 / 14,022 |
| 607. | 42.30 | Jasper County Community Unit School District 1 / 9,531 |
| 607. | 42.30 | Orion Community Unit School District 223 / 6,384 |
| 607. | 42.30 | Lemont-Bromberek Combined School District 113A / 24,160 |
| 607. | 42.30 | Monroe School District 70 / 2,842 |
| 607. | 42.30 | Damiansville School District 62 / 851 |
| 607. | 42.30 | Cambridge Community Unit School District 227 / 3,100 |
| 607. | 42.30 | Ramsey Community Unit School District 204 / 2,813 |
| 607. | 42.30 | Mount Prospect School District 57 / 19,645 |
| 607. | 42.30 | Orland School District 135 / 53,527 |
| 607. | 42.30 | North Wamac School District 186 / 817 |
| 627. | 42.40 | Dongola School Unit District 66 / 1,849 |
| 627. | 42.40 | Taylorville Community Unit School District 3 / 18,790 |
| 627. | 42.40 | Leland Community Unit School District 1 / 1,502 |
| 627. | 42.40 | Wolf Branch School District 113 / 7,782 |
| 627. | 42.40 | Hartsburg-Emden Community Unit School District 21 / 1,178 |
| 627. | 42.40 | Brookfield School District 95 / 10,919 |
| 627. | 42.40 | Lake Bluff Elementary School District 65 / 7,946 |
| 627. | 42.40 | Sangamon Valley Community Unit School District 9 / 4,022 |
| 635. | 42.50 | Spoon River Valley Community Unit School District 4 / 2,187 |
| 635. | 42.50 | West Washington County Community Unit District 10 / 4,147 |
| 635. | 42.50 | Western Community Unit School District 12 / 3,772 |
| 638. | 42.60 | Rome Community Consolidated School District 2 / 2,715 |
| 638. | 42.60 | Kings Consolidated School District 144 / 1,060 |
| 638. | 42.60 | Arlington Heights School District 25 / 49,788 |
| 638. | 42.60 | Morton Community Unit School District 709 / 18,698 |
| 638. | 42.60 | St. Libory Consolidated School District 30 / 825 |
| 638. | 42.60 | Neoga Community Unit School District 3 / 4,907 |
| 644. | 42.70 | Calhoun Community Unit School District 40 / 3,248 |
| 644. | 42.70 | Oak Lawn-Hometown School District 123 / 34,784 |
| 644. | 42.70 | Cobden School Unit District 17 / 3,705 |
| 644. | 42.70 | Fairfield Community High School District 225 / 10,396 |
| 644. | 42.70 | Riley Community Consolidated School District 18 / 3,489 |
| 644. | 42.70 | Casey-Westfield Community Unit School District 4C / 6,066 |
| 650. | 42.80 | Community Unit School District 2 / 5,639 |
| 650. | 42.80 | Schuyler-Industry Community Unit School District 5 / 7,986 |
| 650. | 42.80 | Argenta-Oreana Community Unit School District 1 / 4,371 |
| 650. | 42.80 | Bunker Hill Community Unit School District 8 / 4,318 |
| 650. | 42.80 | Township High School District 113 / 58,968 |
| 650. | 42.80 | Odin Community High School District 700 / 1,714 |
| 650. | 42.80 | Germantown School District 60 / 1,746 |
| 650. | 42.80 | Wilmington Community Unit School District 209U / 9,820 |
| 658. | 42.90 | Durand Community Unit School District 322 / 3,924 |
| 658. | 42.90 | Wilmette School District 39 / 26,126 |
| 658. | 42.90 | Iroquois County Community Unit School District 9 / 7,236 |
| 658. | 42.90 | Hillside School District 93 / 5,047 |
| 662. | 43.00 | Mount Pulaski Community Unit District 23 / 3,775 |
| 662. | 43.00 | Odin School District 122 / 1,723 |
| 662. | 43.00 | Herscher Community Unit School District 2 / 10,616 |
| 662. | 43.00 | Stark County Community Unit School District 100 / 4,935 |
| 662. | 43.00 | Catlin Community Unit School District 5 / 3,080 |
| 667. | 43.10 | Fairmont School District 89 / 3,432 |
| 667. | 43.10 | Venice Community Unit School District 3 / 844 |
| 667. | 43.10 | Hinsdale Township High School District 86 / 74,746 |
| 667. | 43.10 | Anna Jonesboro Community High School District 81 / 11,336 |
| 667. | 43.10 | Roanoke-Benson Community Unit School District 60 / 3,399 |
| 667. | 43.10 | Geneseo Community Unit School District 228 / 15,508 |
| 667. | 43.10 | Glenview Community Consolidated School District 34 / 39,322 |
| 674. | 43.20 | Hampton School District 29 / 2,194 |
| 674. | 43.20 | Wethersfield Community Unit School District 230 / 3,952 |
| 674. | 43.20 | Peru Elementary School District 124 / 10,434 |
| 674. | 43.20 | Mercer County School District 404 / 8,819 |
| 674. | 43.20 | River Trails School District 26 / 15,926 |
| 674. | 43.20 | Rondout School District 72 / 1,645 |
| 680. | 43.30 | North Shore School District 112 / 35,908 |
| 680. | 43.30 | Grant Community Consolidated School District 110 / 7,659 |
| 680. | 43.30 | Robinson Community Unit School District 2 / 12,392 |
| 680. | 43.30 | Grayville Community Unit School District 1 / 2,269 |
| 680. | 43.30 | Hardin County Community Unit School District 1 / 4,402 |
| 680. | 43.30 | Morrison Community Unit School District 6 / 6,818 |
| 680. | 43.30 | Pinckneyville School District 50 / 5,823 |
| 680. | 43.30 | Iuka Community Consolidated School District 7 / 2,016 |
| 688. | 43.40 | New Trier Township High School District 203 / 59,234 |
| 688. | 43.40 | Camp Point Community Unit School District 3 / 4,857 |
| 688. | 43.40 | Winchester Community Unit School District 1 / 3,798 |
| 688. | 43.40 | Egyptian Community Unit School District 5 / 3,902 |
| 688. | 43.40 | Norris City-Omaha-Enfield Community Unit School District 3 / 4,437 |
| 693. | 43.50 | Dodds Community Consolidated School District 7 / 1,517 |
| 693. | 43.50 | Gallatin Community Unit School District 7 / 5,582 |
| 693. | 43.50 | Darien School District 61 / 15,935 |
| 693. | 43.50 | Anna Community Consolidated School District 37 / 7,124 |
| 693. | 43.50 | Winfield School District 34 / 3,950 |
| 698. | 43.60 | Skokie-Fairview School District 72 / 6,609 |
| 698. | 43.60 | Park Ridge Consolidated Community School District 64 / 40,199 |
| 698. | 43.60 | Glencoe School District 35 / 8,430 |
| 698. | 43.60 | Century Community Unit School District 100 / 2,852 |
| 698. | 43.60 | Cherry School District 92 / 495 |
| 698. | 43.60 | Waverly Community Unit School District 6 / 1,720 |
| 698. | 43.60 | Smithton Community Consolidated School District 130 / 4,054 |
| 698. | 43.60 | Knoxville Community Unit School District 202 / 5,998 |
| 698. | 43.60 | Lincolnshire-Prairieview School District 103 / 13,374 |
| 707. | 43.70 | Palestine Community Unit School District 3 / 2,345 |
| 707. | 43.70 | Putnam County Community Unit School District 535 / 5,397 |
| 707. | 43.70 | Sherrard Community Unit School District 200 / 9,197 |
| 707. | 43.70 | Mulberry Grove Community Unit School District 1 / 2,221 |
| 707. | 43.70 | High Mount School District 116 / 4,323 |
| 707. | 43.70 | Amboy Community Unit School District 272 / 5,387 |
| 707. | 43.70 | Flanagan-Cornell District 74 / 1,704 |
| 707. | 43.70 | New Holland-Middletown Elementary School District 88 / 1,139 |
| 707. | 43.70 | Blue Ridge Community Unit School District 18 / 5,134 |
| 716. | 43.80 | Porta Community Unit School District 202 / 6,840 |
| 716. | 43.80 | Wayne City Community Unit School District 100 / 3,129 |
| 716. | 43.80 | Princeton High School District 500 / 12,550 |
| 716. | 43.80 | Skokie School District 68 / 19,918 |
| 716. | 43.80 | Momence Community Unit School District 1 / 7,289 |
| 716. | 43.80 | Brimfield Community Unit School District 309 / 3,732 |
| 716. | 43.80 | Emmons School District 33 / 3,470 |
| 723. | 43.90 | Farmington Central Community Unit School District 265 / 8,099 |
| 723. | 43.90 | South Holland School District 150 / 10,074 |
| 723. | 43.90 | River Bend Community Unit District 2 / 6,730 |
| 723. | 43.90 | Mount Olive Community Unit School District 5 / 3,543 |
| 723. | 43.90 | Prairieview-Ogden Community Consolidated School District 197 / 2,332 |
| 723. | 43.90 | Ashton Community Unit School District 275 / 4,306 |
| 729. | 44.00 | Freeport School District 145 / 30,696 |
| 729. | 44.00 | Coulterville Unit School District 1 / 1,738 |
| 729. | 44.00 | West Prairie Community Unit School District 103 / 4,657 |
| 732. | 44.10 | Niles Township Community High School District 219 / 94,155 |
| 732. | 44.10 | Pembroke Consolidated Community School District 259 / 1,837 |
| 732. | 44.10 | Hamilton Community Consolidated School District 328 / 3,967 |
| 732. | 44.10 | Edwards County Community Unit School District 1 / 5,705 |
| 736. | 44.20 | Woodlawn Community High School District 205 / 3,093 |
| 736. | 44.20 | Meredosia-Chambersburg Community Unit School District 11 / 1,660 |
| 736. | 44.20 | Geff Community Consolidated School District 14 / 975 |
| 736. | 44.20 | Deer Park Community Consolidated School District 82 / 769 |
| 736. | 44.20 | Carmi-White County Community Unit School District 5 / 9,473 |
| 741. | 44.30 | Spring Lake Community Consolidated School District 606 / 775 |
| 741. | 44.30 | Crab Orchard Community Unit School District 3 / 2,359 |
| 741. | 44.30 | Atwood-Hammond Community Unit School District 39 / 2,215 |
| 741. | 44.30 | Cypress School District 64 / 901 |
| 741. | 44.30 | Midland Community Unit School District 7 / 5,409 |
| 741. | 44.30 | Westchester School District 92-5 / 15,733 |
| 741. | 44.30 | Carthage Elementary School District 317 / 4,279 |
| 741. | 44.30 | Lake Forest Community High School District 115 / 27,343 |
| 741. | 44.30 | United Community School District 304 / 6,514 |
| 750. | 44.50 | Princeton Elementary School District 115 / 11,668 |
| 750. | 44.50 | Gillespie Community Unit School District 7 / 7,990 |
| 750. | 44.50 | North Clay Community Unit School District 25 / 3,610 |
| 750. | 44.50 | Riverton Community Unit School District 14 / 8,128 |
| 754. | 44.60 | McClellan Community Consolidated School District 12 / 912 |
| 754. | 44.60 | St. Anne Community High School District 302 / 4,606 |
| 754. | 44.60 | Center Cass School District 66 / 10,870 |
| 754. | 44.60 | Bloomingdale School District 13 / 13,507 |
| 754. | 44.60 | Irvington County Community Unit School District 11 / 787 |
| 759. | 44.70 | Lewistown Community Unit School District 97 / 5,092 |
| 759. | 44.70 | Northfield Township High School District 225 / 84,738 |
| 759. | 44.70 | Sesser-Valier Community Unit School District 196 / 4,306 |
| 759. | 44.70 | Riverdale School District 14 / 1,239 |
| 759. | 44.70 | Woodland Community Unit School District 5 / 3,064 |
| 759. | 44.70 | Ladd Community Consolidated School District 94 / 1,583 |
| 765. | 44.80 | Sparta Community Unit School District 140 / 8,772 |
| 765. | 44.80 | Tri-Point Community Unit School District 6-J / 2,594 |
| 765. | 44.80 | Paxton-Buckley-Loda Community Unit School District 10 / 8,694 |
| 765. | 44.80 | Fairfield Public School District 112 / 6,177 |
| 765. | 44.80 | Havana Community Unit School District 126 / 6,532 |
| 765. | 44.80 | St. Anne Consolidated Community School District 256 / 2,769 |
| 765. | 44.80 | Pleasantdale School District 107 / 8,200 |
| 765. | 44.80 | Community Unit School District 4 / 4,160 |
| 773. | 44.90 | Bushnell-Prairie City Community Unit School District 170 / 4,507 |
| 773. | 44.90 | La Harpe Community School District 347 / 2,318 |
| 773. | 44.90 | West Carroll Community Unit School District 314 / 8,728 |
| 773. | 44.90 | Galva Community Unit School District 224 / 3,588 |
| 773. | 44.90 | Ridgewood Community High School District 234 / 19,068 |
| 773. | 44.90 | DeLand-Weldon Community Unit School District 57 / 1,400 |
| 773. | 44.90 | Riverdale Community Unit School District 100 / 6,535 |
| 780. | 45.00 | Carrollton Community Unit School District 1 / 3,996 |
| 780. | 45.00 | Crescent Iroquois Community Unit School District 249 / 978 |
| 780. | 45.00 | Bismarck-Henning Consolidated Unit School District / 4,445 |
| 780. | 45.00 | Rockridge Community Unit School District 300 / 7,181 |
| 784. | 45.10 | Armstrong Township High School District 225 / 1,401 |
| 784. | 45.10 | Brussels Community Unit School District 42 / 1,595 |
| 784. | 45.10 | Morrisonville Community Unit School District 1 / 1,815 |
| 784. | 45.10 | Northbrook School District 28 / 13,508 |
| 784. | 45.10 | Franklin Community Unit School District 1 / 1,791 |
| 784. | 45.10 | Sullivan Community Unit School District 300 / 7,021 |
| 790. | 45.20 | Richland School District 88A / 10,559 |
| 790. | 45.20 | Warren Community Unit School District 205 / 2,669 |
| 790. | 45.20 | Lake Forest School District 67 / 19,190 |
| 790. | 45.20 | Southeastern Community Unit School District 337 / 3,010 |
| 790. | 45.20 | Ridgeview Community Unit School District 19 / 3,879 |
| 795. | 45.30 | Armstrong-Ellis Consolidated School District 61 / 986 |
| 795. | 45.30 | Martinsville Community Unit School District 3C / 2,224 |
| 795. | 45.30 | Dalzell School District 98 / 807 |
| 798. | 45.40 | Cissna Park Community Unit School District 6 / 1,869 |
| 798. | 45.40 | Patoka Community Unit School District 100 / 1,610 |
| 798. | 45.40 | Shiloh Community Unit School District 1 / 3,183 |
| 801. | 45.50 | Raccoon Consolidated School District 1 / 2,138 |
| 801. | 45.50 | Prospect Heights School District 23 / 18,120 |
| 801. | 45.50 | Lincolnwood School District 74 / 12,422 |
| 801. | 45.50 | Fulton County Community Unit School District 3 / 3,495 |
| 801. | 45.50 | Illini West High School District 307 / 8,749 |
| 806. | 45.60 | Golf Elementary School District 67 / 6,716 |
| 806. | 45.60 | Dakota Community Unit School District 201 / 4,419 |
| 806. | 45.60 | Oakland Community Unit School District 5 / 2,097 |
| 809. | 45.70 | Akin Community Consolidated School District 91 / 745 |
| 809. | 45.70 | East Prairie School District 73 / 4,227 |
| 809. | 45.70 | West Northfield School District 31 / 9,769 |
| 809. | 45.70 | Rooks Creek Community Consolidated School District 425 / 441 |
| 809. | 45.70 | Farrington Community Consolidated School District 99 / 484 |
| 809. | 45.70 | Rutland Community Consolidated School District 230 / 865 |
| 815. | 46.00 | West Central Community Unit School District 235 / 6,536 |
| 816. | 46.10 | Shirland Community Consolidated School District 134 / 1,539 |
| 816. | 46.10 | Alwood Community Unit School District 225 / 2,197 |
| 818. | 46.20 | Cass School District 63 / 8,043 |
| 818. | 46.20 | Astoria Community Unit School District 1 / 2,002 |
| 820. | 46.30 | Pleasant Hill Community Unit School District 3 / 2,195 |
| 820. | 46.30 | Shelbyville Community Unit School District 4 / 7,669 |
| 822. | 46.40 | Summersville School District 79 / 1,859 |
| 822. | 46.40 | Oregon Community Unit School District 220 / 10,898 |
| 822. | 46.40 | Palos Heights School District 128 / 10,015 |
| 825. | 46.50 | Stockton Community Unit School District 206 / 4,004 |
| 825. | 46.50 | Pope County Community Unit School District 1 / 4,426 |
| 827. | 46.80 | Cerro Gordo Community Unit School District 100 / 2,775 |
| 828. | 46.90 | Paris Community Unit School District 4 / 4,467 |
| 828. | 46.90 | Northbrook Elementary School District 27 / 11,349 |
| 830. | 47.10 | Riverview Consolidated Community School District 2 / 2,875 |
| 830. | 47.10 | Norridge School District 80 / 12,811 |
| 832. | 47.20 | Galena Unit School District 120 / 5,628 |
| 832. | 47.20 | Avon Community Unit School District 176 / 1,854 |
| 834. | 47.30 | Eastland Community Unit School District 308 / 4,447 |
| 835. | 47.40 | East Coloma School District 12 / 2,491 |
| 835. | 47.40 | Limestone Walters Community Consolidated School District 316 / 1,729 |
| 835. | 47.40 | Grass Lake School District 36 / 2,759 |
| 838. | 47.50 | Iroquois West Community Unit School District 10 / 5,709 |
| 839. | 47.70 | Wallace Community Consolidated School District 195 / 2,572 |
| 840. | 47.80 | Woodlawn Community Consolidated School District 4 / 2,464 |
| 840. | 47.80 | Leepertown Community Consolidated School District 175 / 321 |
| 842. | 47.90 | Allen Township Community Consolidated School District 65 / 992 |
| 842. | 47.90 | Dallas Elementary School District 327 / 2,152 |
| 844. | 48.00 | LaGrange Highlands School District 106 / 8,855 |
| 844. | 48.00 | Hoyleton Consolidated School District 29 / 1,000 |
| 844. | 48.00 | Sunset Ridge School District 29 / 4,041 |
| 847. | 48.10 | Northbrook/Glenview School District 30 / 10,790 |
| 848. | 48.20 | Harmony Emge School District 175 / 9,740 |
| 848. | 48.20 | Lick Creek Community Consolidated School District 16 / 1,080 |
| 848. | 48.20 | Pennoyer School District 79 / 5,428 |
| 851. | 48.40 | Alden-Hebron School District 19 / 2,888 |
| 852. | 48.50 | Henry-Senachwine Consolidated Unit School District 5 / 3,905 |
| 853. | 48.70 | Peoria Heights Community Unit School District 325 / 7,512 |
| 854. | 48.90 | Goreville Community Unit School District 1 / 2,984 |
| 855. | 49.00 | Salt Creek School District 48 / 9,136 |
| 856. | 49.20 | Nauvoo-Colusa Community Unit School District 325 / 1,937 |
| 857. | 49.30 | Hollis Consolidated School District 328 / 623 |
| 858. | 49.50 | Carrier Mills-Stonefort Community Unit School District / 2,841 |
| 859. | 49.90 | Nettle Creek Community Consolidated School District 24C / 860 |
| 859. | 49.90 | Avoca School District 37 / 5,979 |
| 861. | 50.10 | River Ridge Community Unit School District 210 / 4,050 |
| 862. | 50.20 | Palos Community Consolidated School District 118 / 22,984 |
| 862. | 50.20 | Brooklyn Community Unit School District 188 / 523 |
| 864. | 50.40 | Clay City Community Unit District 10 / 2,359 |
| 865. | 50.70 | Scales Mound Community Unit School District 211 / 1,972 |
| 866. | 50.90 | Gower School District 62 / 9,559 |
| 867. | 51.20 | Neponset Community Consolidated District 307 / 846 |
| 868. | 52.50 | Niles Elementary School District 71 / 7,765 |
| 869. | 54.40 | Williamsfield Community Unit School District 210 / 1,738 |
| 870. | 56.20 | Butler School District 53 / 4,338 |
| 871. | 59.60 | Flanagan-Cornell District 74 in Pontiac / 47 |
Please note that we only rank locations with 'Median Age' data. The rank above might not be a complete list. Locations without 'Median Age' 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.
