| Rank | Median Age ▲ | School District / Population |
| 1. | 23.70 | North Chicago School District 187 / 29,740 |
| 2. | 23.80 | Macomb Community Unit School District 185 / 22,522 |
| 2. | 23.80 | Bannockburn School District 106 / 2,091 |
| 4. | 24.00 | Carbondale Elementary School District 95 / 27,892 |
| 5. | 24.10 | DeKalb Community Unit School District 428 / 52,331 |
| 6. | 24.70 | Charleston Community Unit School District 1 / 28,530 |
| 7. | 24.90 | Urbana School District 116 / 50,724 |
| 8. | 25.10 | Carbondale Community High School District 165 / 37,413 |
| 9. | 25.90 | General George Patton School District 133 / 2,314 |
| 10. | 27.90 | Champaign Community Unit School District 4 / 93,805 |
| 10. | 27.90 | Lincoln Elementary School District 156 / 7,603 |
| 12. | 28.00 | Community Consolidated School District 168 / 10,276 |
| 12. | 28.00 | Cicero School District 99 / 83,924 |
| 14. | 28.80 | Ford Heights School District 169 / 2,787 |
| 15. | 28.90 | McLean County Unit School District 5 / 94,106 |
| 16. | 29.10 | Arthur Community Unit School District 305 / 5,848 |
| 17. | 29.30 | Mascoutah Community Unit School District 19 / 17,438 |
| 17. | 29.30 | Aurora East Unit School District 131 / 81,256 |
| 19. | 29.40 | Carbon Cliff-Barstow School District 36 / 1,906 |
| 20. | 29.70 | Unity Point Community Consolidated School District 140 / 5,256 |
| 21. | 29.80 | Berwyn North School District 98 / 25,179 |
| 22. | 29.90 | Harvey School District 152 / 16,749 |
| 22. | 29.90 | Brooklyn Community Unit School District 188 / 669 |
| 22. | 29.90 | Summit School District 104 / 12,459 |
| 25. | 30.00 | Rhodes School District 84-5 / 5,096 |
| 26. | 30.10 | Cahokia Community Unit School District 187 / 19,432 |
| 27. | 30.20 | Round Lake Community Unit School District 116 / 36,332 |
| 28. | 30.30 | Zion Elementary School District 6 / 17,477 |
| 29. | 30.40 | J. Sterling Morton High School District 201 / 158,414 |
| 30. | 30.50 | Creston Community Consolidated School District 161 / 1,095 |
| 30. | 30.50 | Chicago Heights School District 170 / 24,925 |
| 32. | 30.70 | Waukegan Community Unit School District 60 / 83,983 |
| 33. | 31.10 | Taft School District 90 / 3,929 |
| 34. | 31.20 | Depue Community Unit School District 103 / 2,056 |
| 34. | 31.20 | Central Stickney School District 110 / 3,097 |
| 34. | 31.20 | Sandridge School District 172 / 4,641 |
| 34. | 31.20 | Plano Community Unit School District 88 / 10,772 |
| 38. | 31.50 | Harvard Community Unit School District 50 / 13,577 |
| 39. | 31.90 | Marquardt School District 15 / 26,404 |
| 39. | 31.90 | Joliet Public School District 86 / 85,318 |
| 41. | 32.30 | West Chicago School District 33 / 30,843 |
| 41. | 32.30 | Bloom Township High School District 206 / 65,207 |
| 43. | 32.40 | Plainfield School District 202 / 120,416 |
| 44. | 32.50 | Dolton School District 148 / 22,680 |
| 44. | 32.50 | Oswego Community Unit School District 308 / 74,841 |
| 46. | 32.60 | Nelson Public School District 8 / 486 |
| 46. | 32.60 | Manhattan School District 114 / 9,169 |
| 48. | 32.70 | St. George Community Consolidated School District 258 / 3,341 |
| 49. | 32.90 | Central School District 104 / 5,033 |
| 49. | 32.90 | Calumet Public School District 132 / 11,547 |
| 49. | 32.90 | Bloomington School District 87 / 45,049 |
| 49. | 32.90 | Minooka Community Consolidated School District 201 / 23,438 |
| 53. | 33.10 | Chicago Public School District 299 / 2,702,420 |
| 53. | 33.10 | Bellwood School District 88 / 23,258 |
| 53. | 33.10 | Hazel Crest School District 152-5 / 8,671 |
| 56. | 33.20 | Joliet Township High School District 204 / 129,192 |
| 56. | 33.20 | Valley View Community Unit School District 365U / 91,972 |
| 58. | 33.40 | Argo Community High School District 217 / 40,342 |
| 59. | 33.50 | West Harvey-Dixmoor Public School District 147 / 10,106 |
| 59. | 33.50 | Diamond Lake School District 76 / 8,892 |
| 61. | 33.60 | Indian Springs School District 109 / 24,784 |
| 62. | 33.70 | Peoria School District 150 / 101,678 |
| 62. | 33.70 | Rantoul City School District 137 / 12,569 |
| 64. | 33.90 | East St. Louis School District 189 / 38,613 |
| 65. | 34.00 | Community Consolidated School District 180 / 6,850 |
| 65. | 34.00 | Bourbonnais School District 53 / 23,743 |
| 67. | 34.10 | Minooka Community High School District 111 / 37,729 |
| 67. | 34.10 | Keeneyville School District 20 / 14,153 |
| 69. | 34.20 | School District U-46 / 232,134 |
| 70. | 34.30 | South Wilmington Consolidated School District 74 / 814 |
| 70. | 34.30 | Kankakee School District 111 / 33,001 |
| 70. | 34.30 | Bradley-Bourbonnais Consolidated High School District 307 / 39,772 |
| 70. | 34.30 | Malden Community Consolidated School District 84 / 950 |
| 74. | 34.40 | Big Hollow School District 38 / 14,983 |
| 74. | 34.40 | Indian Prairie Community Unit School District 204 / 126,881 |
| 74. | 34.40 | Queen Bee School District 16 / 17,277 |
| 74. | 34.40 | Maywood-Melrose Park-Broadview School District 89 / 44,548 |
| 78. | 34.70 | Aurora West Unit School District 129 / 76,944 |
| 79. | 34.80 | Teutopolis Community Unit School District 50 / 5,557 |
| 79. | 34.80 | Signal Hill School District 181 / 3,566 |
| 79. | 34.80 | Midlothian School District 143 / 15,081 |
| 79. | 34.80 | Community High School District 94 / 41,209 |
| 83. | 34.90 | Auburn Community Unit School District 10 / 7,144 |
| 83. | 34.90 | Dunlap Community Unit School District 323 / 20,345 |
| 85. | 35.00 | Calumet City School District 155 / 11,417 |
| 85. | 35.00 | Evanston Community Consolidated School District 65 / 82,936 |
| 85. | 35.00 | Evanston Township High School District 202 / 82,936 |
| 85. | 35.00 | Sycamore Community Unit School District 427 / 22,322 |
| 85. | 35.00 | Chaney-Monge School District 88 / 6,780 |
| 90. | 35.10 | Schiller Park School District 81 / 12,877 |
| 90. | 35.10 | Lyons School District 103 / 22,468 |
| 92. | 35.20 | Rantoul Township High School District 193 / 17,434 |
| 92. | 35.20 | St. Rose School District 14-15 / 1,418 |
| 92. | 35.20 | Arcola Consolidated Unit School District 306 / 4,501 |
| 92. | 35.20 | Grayslake Consolidated Community School District 46 / 30,032 |
| 96. | 35.30 | Edwardsville Community Unit School District 7 / 50,788 |
| 96. | 35.30 | Leyden Community High School District 212 / 64,152 |
| 96. | 35.30 | Genoa-Kingston Community Unit School District 424 / 9,126 |
| 96. | 35.30 | Yorkville Community Unit School District 115 / 27,998 |
| 96. | 35.30 | Bradley School District 61 / 12,688 |
| 101. | 35.40 | Woodridge School District 68 / 32,321 |
| 101. | 35.40 | Earlville Community Unit School District 9 / 2,770 |
| 101. | 35.40 | St. Joseph Community Consolidated School District 169 / 5,828 |
| 104. | 35.50 | Valmeyer Community Unit School District 3 / 2,645 |
| 105. | 35.60 | Thornton Township High School District 205 / 114,616 |
| 105. | 35.60 | Arbor Park School District 145 / 12,560 |
| 105. | 35.60 | Posen-Robbins Elementary School District 143-5 / 12,153 |
| 105. | 35.60 | Forest Ridge School District 142 / 17,211 |
| 109. | 35.70 | Millburn Community Consolidated School District 24 / 9,082 |
| 109. | 35.70 | South Holland School District 151 / 13,070 |
| 109. | 35.70 | Mannheim School District 83 / 21,198 |
| 109. | 35.70 | Troy Community Consolidated School District 30C / 35,666 |
| 109. | 35.70 | Zion-Benton Township High School District 126 / 44,722 |
| 114. | 35.80 | Central Community Unit School District 301 / 17,228 |
| 114. | 35.80 | Bremen Community High School District 228 / 94,256 |
| 114. | 35.80 | Odell Community Consolidated School District 435 / 1,424 |
| 114. | 35.80 | Berwyn South School District 100 / 31,197 |
| 114. | 35.80 | Community Unit School District 300 / 109,175 |
| 119. | 35.90 | Meridian Community Unit School District 223 / 8,847 |
| 119. | 35.90 | Belvidere Consolidated Unit School District 100 / 45,024 |
| 119. | 35.90 | Pleasant Valley School District 62 / 4,937 |
| 122. | 36.00 | South Pekin School District 137 / 1,977 |
| 122. | 36.00 | Reavis Township High School District 220 / 33,088 |
| 122. | 36.00 | Berkeley School District 87 / 21,709 |
| 122. | 36.00 | Cairo Community Unit School District 1 / 3,026 |
| 122. | 36.00 | Monmouth-Roseville Community Unit School District 238 / 11,394 |
| 122. | 36.00 | Bradford Community Unit School District 1 / 1,901 |
| 122. | 36.00 | Bond County Community Unit School District 2 / 13,536 |
| 129. | 36.10 | Community Consolidated School District 204 / 3,601 |
| 129. | 36.10 | Chester-East Lincoln Community Csd 61 / 5,509 |
| 129. | 36.10 | Mundelein Consolidated High School District 120 / 42,938 |
| 129. | 36.10 | St. Joseph-Ogden Community High School District 305 / 7,859 |
| 129. | 36.10 | Allendale Community Consolidated School District 17 / 1,065 |
| 129. | 36.10 | Thomasboro Community Consolidated School District 130 / 2,248 |
| 135. | 36.20 | Wauconda Community Unit School District 118 / 26,997 |
| 135. | 36.20 | Prairie-Hills Elementary School District 144 / 22,582 |
| 135. | 36.20 | Rosemont Elementary School District 78 / 2,318 |
| 135. | 36.20 | Pecatonica Community Unit School District 321 / 5,318 |
| 135. | 36.20 | Buncombe Consolidated School District 43 / 714 |
| 140. | 36.30 | Community Consolidated School District 93 / 35,814 |
| 140. | 36.30 | Addison School District 4 / 38,048 |
| 140. | 36.30 | Chicago Ridge School District 127-5 / 13,160 |
| 140. | 36.30 | Grayslake Community High School District 127 / 44,111 |
| 140. | 36.30 | Mazon-Verona-Kinsman Elementary School District 2C / 2,863 |
| 140. | 36.30 | Jonesboro Community Consolidated School District 43 / 2,981 |
| 140. | 36.30 | Thornton Fractional Township High School District 215 / 61,172 |
| 140. | 36.30 | Franklin Park School District 84 / 11,391 |
| 148. | 36.40 | Hawthorn Community Consolidated School District 73 / 30,381 |
| 148. | 36.40 | Cook County School District 130 / 28,926 |
| 148. | 36.40 | Marengo-Union Elementary Consolidated District 165 / 10,564 |
| 151. | 36.50 | New Lenox School District 122 / 38,681 |
| 151. | 36.50 | Central School District 51 / 7,948 |
| 153. | 36.60 | Laraway Community Consolidated School District 70C / 3,218 |
| 153. | 36.60 | Eureka Community Unit District 140 / 9,774 |
| 153. | 36.60 | O'Fallon Township High School District 203 / 39,357 |
| 156. | 36.70 | Lake Villa Community Consolidated School District 41 / 23,252 |
| 156. | 36.70 | Atwood Heights School District 125 / 7,582 |
| 156. | 36.70 | Burbank School District 111 / 29,991 |
| 156. | 36.70 | Prairie du Rocher Community Consolidated School District 134 / 809 |
| 156. | 36.70 | Chester Non-High School District 122 / 809 |
| 156. | 36.70 | Community Unit School District 200 / 78,818 |
| 156. | 36.70 | Steger School District 194 / 13,624 |
| 156. | 36.70 | South Beloit Community Unit School District 320 / 6,667 |
| 156. | 36.70 | Beardstown Community Unit School District 15 / 7,937 |
| 156. | 36.70 | Donovan Community Unit School District 3 / 2,316 |
| 166. | 36.80 | Saratoga Community Consolidated School District 60C / 6,039 |
| 166. | 36.80 | Tolono Community Unit School District 7 / 9,762 |
| 166. | 36.80 | Bensenville School District 2 / 19,373 |
| 166. | 36.80 | Proviso Township High School District 209 / 126,620 |
| 166. | 36.80 | Madison Community Unit School District 12 / 4,913 |
| 166. | 36.80 | O'Fallon Community Consolidated School District 90 / 28,189 |
| 166. | 36.80 | Palatine Community Consolidated School District 15 / 118,761 |
| 166. | 36.80 | South Fork School District 14 / 2,636 |
| 166. | 36.80 | Villa Park School District 45 / 36,595 |
| 175. | 36.90 | Burnham School District 154-5 / 1,552 |
| 175. | 36.90 | West Lincoln-Broadwell Elementary School District 92 / 4,936 |
| 175. | 36.90 | Glenbard Township High School District 87 / 166,367 |
| 175. | 36.90 | Gurnee School District 56 / 18,066 |
| 175. | 36.90 | North Pekin-Marquette Heights School District 102 / 5,184 |
| 175. | 36.90 | Warren Township High School District 121 / 68,254 |
| 181. | 37.00 | Woodland Community Consolidated School District 50 / 50,516 |
| 181. | 37.00 | Lowpoint-Washburn Community Unit School District 21 / 2,501 |
| 181. | 37.00 | Alsip-Hazelgreen-Oaklawn School District 126 / 17,939 |
| 181. | 37.00 | Park Forest School District 163 / 15,603 |
| 181. | 37.00 | Coal City Community Unit School District 1 / 11,429 |
| 181. | 37.00 | Grand Ridge Community Consolidated School District 95 / 2,573 |
| 187. | 37.10 | Rochelle Community Consolidated District 231 / 13,516 |
| 187. | 37.10 | Schaumburg Community Consolidated School District 54 / 132,967 |
| 187. | 37.10 | Crystal Lake Community Consolidated School District 47 / 62,181 |
| 187. | 37.10 | Beach Park Community Consolidated School District 3 / 20,556 |
| 191. | 37.20 | Payson Community Unit School District 1 / 3,651 |
| 191. | 37.20 | Harrison School District 36 / 3,891 |
| 191. | 37.20 | Aviston School District 21 / 2,611 |
| 191. | 37.20 | Whiteside School District 115 / 12,526 |
| 191. | 37.20 | Brown County Community Unit School District 1 / 6,907 |
| 191. | 37.20 | Township High School District 211 / 235,114 |
| 191. | 37.20 | Homer Community Consolidated School District 33C / 29,811 |
| 191. | 37.20 | Byron Community Unit School District 226 / 8,045 |
| 199. | 37.30 | Mount Vernon School District 80 / 14,109 |
| 199. | 37.30 | Ridgeland School District 122 / 21,369 |
| 199. | 37.30 | Red Hill Community Unit School District 10 / 8,881 |
| 199. | 37.30 | Summit Hill School District 161 / 23,236 |
| 203. | 37.40 | Channahon School District 17 / 10,249 |
| 203. | 37.40 | Albers School District 63 / 1,510 |
| 203. | 37.40 | Belleville School District 118 / 38,003 |
| 203. | 37.40 | Rochelle Township High School District 212 / 17,208 |
| 203. | 37.40 | De Soto Consolidated School District 86 / 1,909 |
| 203. | 37.40 | Kewanee Community Unit School District 229 / 11,012 |
| 209. | 37.50 | Evergreen Park Community High School District 231 / 19,852 |
| 209. | 37.50 | Evergreen Park Elementary School District 124 / 19,852 |
| 209. | 37.50 | Rockdale School District 84 / 2,192 |
| 209. | 37.50 | Lisbon Community Consolidated School District 90 / 891 |
| 213. | 37.60 | DuPage High School District 88 / 82,688 |
| 213. | 37.60 | McHenry Community High School District 156 / 46,490 |
| 213. | 37.60 | Rockford School District 205 / 192,951 |
| 213. | 37.60 | Wheeling Community Consolidated School District 21 / 65,194 |
| 213. | 37.60 | Chester Community Unit School District 139 / 11,500 |
| 218. | 37.70 | Carterville Community Unit School District 5 / 11,344 |
| 218. | 37.70 | Prophetstown-Lyndon-Tampico Community Unit School District 3 / 5,979 |
| 218. | 37.70 | Antioch Community Consolidated School District 34 / 23,358 |
| 218. | 37.70 | Washington Community High School District 308 / 23,440 |
| 218. | 37.70 | Fenton Community High School District 100 / 29,827 |
| 218. | 37.70 | McHenry Community Consolidated School District 15 / 43,205 |
| 218. | 37.70 | Glen Ellyn School District 41 / 29,745 |
| 218. | 37.70 | Grant Community High School District 124 / 36,070 |
| 226. | 37.80 | Danville Community Consolidated School District 118 / 39,546 |
| 226. | 37.80 | Thompsonville Community Unit School District 174 / 2,159 |
| 226. | 37.80 | Bethel School District 82 / 1,024 |
| 226. | 37.80 | District 50 Schools / 7,128 |
| 226. | 37.80 | Breese School District 12 / 7,070 |
| 226. | 37.80 | Mahomet-Seymour Community Unit School District 3 / 13,899 |
| 226. | 37.80 | Woodstock Community Unit School District 200 / 37,344 |
| 233. | 37.90 | Gardner-South Wilmington Township High School District / 4,004 |
| 233. | 37.90 | Community High School District 155 / 96,837 |
| 235. | 38.00 | Braceville School District 75 / 1,466 |
| 235. | 38.00 | Lincoln Way Community High School District 210 / 103,957 |
| 235. | 38.00 | Waltonville Community Unit School District 1 / 1,988 |
| 235. | 38.00 | Community Consolidated School District 59 / 66,361 |
| 239. | 38.10 | Oak Grove School District 68 / 4,037 |
| 239. | 38.10 | Community High School District 218 / 121,659 |
| 239. | 38.10 | Kaneland Community Unit School District 302 / 25,299 |
| 239. | 38.10 | Community Unit School District 2 / 6,214 |
| 239. | 38.10 | Central Community High School District 71 / 16,423 |
| 244. | 38.20 | Granite City Community Unit School District 9 / 43,514 |
| 244. | 38.20 | Dolton School District 149 / 26,527 |
| 244. | 38.20 | Herrin Community Unit School District 4 / 16,258 |
| 244. | 38.20 | Ramsey Community Unit School District 204 / 2,867 |
| 244. | 38.20 | Prairie Central Community Unit School District 8 / 11,458 |
| 244. | 38.20 | Wayne City Community Unit School District 100 / 3,487 |
| 244. | 38.20 | Ludlow Community Consolidated School District 142 / 1,012 |
| 244. | 38.20 | River Grove School District 85-5 / 7,640 |
| 244. | 38.20 | Collinsville Community Unit School District 10 / 48,357 |
| 244. | 38.20 | LaGrange School District 105 / 12,677 |
| 254. | 38.30 | Community Consolidated School District 146 / 26,189 |
| 254. | 38.30 | Orangeville Community Unit School District 203 / 2,710 |
| 254. | 38.30 | Jasper Community Consolidated School District 17 / 1,617 |
| 254. | 38.30 | Hutsonville Community Unit School District 1 / 2,328 |
| 254. | 38.30 | Catlin Community Unit School District 5 / 3,151 |
| 254. | 38.30 | Cary Community Consolidated School District 26 / 22,506 |
| 254. | 38.30 | Springfield School District 186 / 113,809 |
| 261. | 38.40 | Seneca Township High School District 160 / 7,284 |
| 261. | 38.40 | Silvis School District 34 / 5,528 |
| 261. | 38.40 | Oak Lawn Community High School District 229 / 39,686 |
| 261. | 38.40 | Pontiac-William Holliday School District 105 / 8,308 |
| 261. | 38.40 | Central Community Unit School District 4 / 6,895 |
| 261. | 38.40 | Name N/A / 4,792,985 |
| 267. | 38.50 | Farrington Community Consolidated School District 99 / 595 |
| 267. | 38.50 | Fox River Grove Consolidated School District 3 / 4,465 |
| 267. | 38.50 | Carlyle Community Unit School District 1 / 10,091 |
| 267. | 38.50 | Seneca Community Consolidated School District 170 / 3,662 |
| 267. | 38.50 | Hiawatha Community Unit School District 426 / 3,124 |
| 267. | 38.50 | Oak Park Elementary School District 97 / 51,781 |
| 267. | 38.50 | Manteno Community Unit School District 5 / 12,188 |
| 267. | 38.50 | Rock Island School District 41 / 45,126 |
| 267. | 38.50 | Washington School District 52 / 8,364 |
| 276. | 38.60 | Steward Elementary School District 220 / 700 |
| 276. | 38.60 | Bethalto Consolidated Unit School District 8 / 16,328 |
| 276. | 38.60 | Ina Community Consolidated School District 8 / 3,085 |
| 276. | 38.60 | Tonica Community Consolidated School District 79 / 1,648 |
| 276. | 38.60 | Bement Community Unit School District 5 / 2,594 |
| 276. | 38.60 | Lincoln Community High School District 404 / 24,227 |
| 276. | 38.60 | Brookwood School District 167 / 10,877 |
| 276. | 38.60 | Wood River-Hartford Elementary School District 15 / 6,300 |
| 276. | 38.60 | Giant City Community Consolidated School District 130 / 2,356 |
| 285. | 38.70 | North Boone Community Unit School District 200 / 8,634 |
| 285. | 38.70 | Lockport Township High School District 205 / 75,533 |
| 287. | 38.80 | Webber Township High School District 204 / 3,066 |
| 287. | 38.80 | Huntley Consolidated School District 158 / 42,346 |
| 287. | 38.80 | North Palos School District 117 / 28,460 |
| 287. | 38.80 | Marengo Community High School District 154 / 14,202 |
| 287. | 38.80 | Oak Park and River Forest District 200 / 62,955 |
| 287. | 38.80 | Antioch Community High School District 117 / 44,846 |
| 287. | 38.80 | Elmhurst School District 205 / 46,896 |
| 287. | 38.80 | Bartonville School District 66 / 2,115 |
| 295. | 38.90 | Decatur School District 61 / 72,287 |
| 295. | 38.90 | St. Charles Community Unit School District 303 / 68,196 |
| 295. | 38.90 | Johnston City Community Unit School District 1 / 7,511 |
| 295. | 38.90 | Shiloh Village School District 85 / 4,769 |
| 295. | 38.90 | Forest Park School District 91 / 14,039 |
| 295. | 38.90 | Le Roy Community Unit School District 2 / 4,561 |
| 301. | 39.00 | Dwight Township High School District 230 / 6,861 |
| 301. | 39.00 | Batavia Unit School District 101 / 32,091 |
| 301. | 39.00 | Ball-Chatham Community Unit School District 5 / 26,839 |
| 301. | 39.00 | North Greene Unit School District 3 / 6,282 |
| 301. | 39.00 | El Paso-Gridley Community Unit School District 11 / 6,967 |
| 301. | 39.00 | Worth School District 127 / 11,367 |
| 307. | 39.10 | Alton Community Unit School District 11 / 48,625 |
| 307. | 39.10 | Bartelso School District 57 / 1,285 |
| 307. | 39.10 | United Township High School District 30 / 41,098 |
| 307. | 39.10 | Ohio Community High School District 505 / 832 |
| 307. | 39.10 | Tuscola Community Unit School District 301 / 5,877 |
| 307. | 39.10 | Ohio Community Consolidated School District 17 / 824 |
| 307. | 39.10 | Galatia Community Unit School District 1 / 2,514 |
| 307. | 39.10 | Ewing Northern Community Consolidated District 115 / 1,872 |
| 307. | 39.10 | Belleville Township High School District 201 / 108,596 |
| 307. | 39.10 | Dwight Common School District 232 / 6,632 |
| 307. | 39.10 | Rockton School District 140 / 12,263 |
| 307. | 39.10 | Vandalia Community Unit School District 203 / 11,157 |
| 319. | 39.20 | Salem School District 111 / 8,940 |
| 319. | 39.20 | New Athens Community Unit School District 60 / 4,120 |
| 319. | 39.20 | Tremont Community Unit School District 702 / 5,004 |
| 319. | 39.20 | Belle Valley School District 119 / 9,044 |
| 319. | 39.20 | Pinckneyville Community High School District 101 / 11,188 |
| 319. | 39.20 | Medinah School District 11 / 6,959 |
| 319. | 39.20 | Rock Falls Elementary School District 13 / 7,720 |
| 319. | 39.20 | Paris-Union School District 95 / 8,759 |
| 319. | 39.20 | Lansing School District 158 / 22,932 |
| 328. | 39.30 | Sunnybrook School District 171 / 10,810 |
| 328. | 39.30 | Crete-Monee Community Unit School District 201-U / 33,416 |
| 328. | 39.30 | Kirby School District 140 / 35,803 |
| 328. | 39.30 | Mendota Community Consolidated School District 289 / 10,235 |
| 328. | 39.30 | Moline Unit School District 40 / 48,009 |
| 328. | 39.30 | Metamora Community Consolidated School District 1 / 6,947 |
| 328. | 39.30 | Dupo Community Unit School District 196 / 6,958 |
| 328. | 39.30 | Lostant Community Unit School District 425 / 851 |
| 328. | 39.30 | Highland Community Unit School District 5 / 18,121 |
| 337. | 39.40 | North Wamac School District 186 / 987 |
| 337. | 39.40 | Mendota Township High School District 280 / 10,308 |
| 337. | 39.40 | Triad Community Unit School District 2 / 21,111 |
| 337. | 39.40 | Morris Community High School District 101 / 18,146 |
| 337. | 39.40 | Morris School District 54 / 11,454 |
| 342. | 39.50 | Georgetown-Ridge Farm Consolidated Unit School District 4 / 6,846 |
| 342. | 39.50 | Will County School District 92 / 14,486 |
| 342. | 39.50 | Cambridge Community Unit School District 227 / 3,072 |
| 342. | 39.50 | Roxana Community Unit School District 1 / 12,503 |
| 342. | 39.50 | Colona School District 190 / 4,182 |
| 342. | 39.50 | Mundelein Elementary School District 75 / 14,736 |
| 342. | 39.50 | Gardner Community Consolidated School District 72C / 1,724 |
| 342. | 39.50 | Lovington Community Unit School District 303 / 1,740 |
| 342. | 39.50 | Spoon River Valley Community Unit School District 4 / 2,471 |
| 342. | 39.50 | Delavan Community Unit School District 703 / 2,530 |
| 342. | 39.50 | Harlem Unit School District 122 / 45,149 |
| 353. | 39.60 | Northwestern Community Unit School District 2 / 2,466 |
| 353. | 39.60 | Streator Township High School District 40 / 18,491 |
| 353. | 39.60 | Township High School District 214 / 251,753 |
| 356. | 39.70 | Altamont Community Unit School District 10 / 5,014 |
| 356. | 39.70 | Streator Elementary School District 44 / 16,883 |
| 356. | 39.70 | Tri-Valley Community Unit School District 3 / 4,607 |
| 356. | 39.70 | Astoria Community Unit School District 1 / 2,277 |
| 356. | 39.70 | Riverton Community Unit School District 14 / 8,069 |
| 356. | 39.70 | Rossville-Alvin Community Unit School District 7 / 2,473 |
| 356. | 39.70 | Trico Community Unit School District 176 / 6,443 |
| 356. | 39.70 | Sandwich Community Unit School District 430 / 14,250 |
| 356. | 39.70 | Wood Dale School District 7 / 10,454 |
| 356. | 39.70 | Panhandle Community Unit School District 2 / 2,889 |
| 356. | 39.70 | Oakwood Community Unit School District 76 / 6,107 |
| 356. | 39.70 | East Peoria School District 86 / 18,705 |
| 368. | 39.80 | Elmwood Park Community Unit School District 401 / 24,876 |
| 368. | 39.80 | Naperville Community Unit District 203 / 95,161 |
| 368. | 39.80 | Spring Valley Community Consolidated School District 99 / 5,982 |
| 368. | 39.80 | East Moline School District 37 / 27,063 |
| 372. | 39.90 | Kinnikinnick Community Consolidated School District 131 / 13,414 |
| 372. | 39.90 | Pearl City Community Unit School District 200 / 2,879 |
| 372. | 39.90 | Columbia Community Unit School District 4 / 12,633 |
| 372. | 39.90 | Palestine Community Unit School District 3 / 2,588 |
| 372. | 39.90 | Cumberland Community Unit School District 77 / 6,296 |
| 372. | 39.90 | Winnebago Community Unit School District 323 / 8,280 |
| 372. | 39.90 | Union School District 81 / 1,473 |
| 372. | 39.90 | LaSalle Elementary School District 122 / 9,092 |
| 372. | 39.90 | Marissa Community Unit School District 40 / 3,551 |
| 381. | 40.00 | Hononegah Community High School District 207 / 32,082 |
| 381. | 40.00 | A-C Central Community Unit School District 262 / 2,927 |
| 381. | 40.00 | Community High School District 99 / 109,533 |
| 381. | 40.00 | Pleasant Hill Community Unit School District 3 / 2,142 |
| 381. | 40.00 | Effingham Community Unit School District 40 / 20,242 |
| 386. | 40.10 | Prairie Hill Community Consolidated School District 133 / 5,052 |
| 386. | 40.10 | Bluford Community Consolidated School District 114 / 2,710 |
| 386. | 40.10 | Chadwick-Milledgeville Community Unit School District 399 / 3,333 |
| 386. | 40.10 | Quincy School District 172 / 50,972 |
| 386. | 40.10 | Lee Center Community Unit School District 271 / 1,764 |
| 386. | 40.10 | Opdyke-Belle Rive Community Consolidated School District 5 / 1,902 |
| 386. | 40.10 | Selmaville Community Consolidated School District 10 / 2,015 |
| 386. | 40.10 | Canton Union School District 66 / 17,765 |
| 386. | 40.10 | Du Quoin Community Unit School District 300 / 9,506 |
| 386. | 40.10 | Kenilworth School District 38 / 3,114 |
| 386. | 40.10 | Deer Creek-Mackinaw Community Unit School District 701 / 5,860 |
| 397. | 40.20 | Flanagan-Cornell District 74 in Cornell / 1,018 |
| 397. | 40.20 | South Central Community Unit School District 401 / 4,761 |
| 397. | 40.20 | Cornell Community Consolidated School District 426 / 1,018 |
| 397. | 40.20 | Mattoon Community Unit School District 2 / 23,059 |
| 397. | 40.20 | Creve Coeur School District 76 / 6,123 |
| 397. | 40.20 | Central City School District 133 / 2,193 |
| 397. | 40.20 | Jacksonville School District 117 / 28,304 |
| 397. | 40.20 | Greenfield Community Unit School District 10 / 3,122 |
| 397. | 40.20 | East Peoria Community High School District 309 / 26,288 |
| 406. | 40.30 | Pekin Community High School District 303 / 45,803 |
| 406. | 40.30 | Indian Creek Community Unit District 425 / 4,634 |
| 406. | 40.30 | Grant Park Community Unit School District 6 / 3,281 |
| 406. | 40.30 | Matteson Elementary School District 162 / 25,116 |
| 406. | 40.30 | Mount Vernon Township High School District 201 / 29,842 |
| 411. | 40.40 | Rich Township High School District 227 / 68,652 |
| 411. | 40.40 | Dalzell School District 98 / 816 |
| 411. | 40.40 | Nashville Consolidated Community School District 49 / 5,724 |
| 411. | 40.40 | Komarek School District 94 / 5,117 |
| 411. | 40.40 | Scott-Morgan Consolidated Unit School District 2 / 1,539 |
| 416. | 40.50 | Des Plaines Community Consolidated School District 62 / 51,169 |
| 416. | 40.50 | Dongola School Unit District 66 / 1,869 |
| 416. | 40.50 | Flora Community Unit School District 35 / 8,311 |
| 416. | 40.50 | McClellan Community Consolidated School District 12 / 955 |
| 416. | 40.50 | Lake Park Community High School District 108 / 50,328 |
| 416. | 40.50 | Galesburg Community Unit School District 205 / 35,039 |
| 416. | 40.50 | St. Anne Consolidated Community School District 256 / 2,856 |
| 416. | 40.50 | Heyworth Community Unit School District 4 / 4,866 |
| 416. | 40.50 | Lexington Community Unit School District 7 / 3,014 |
| 416. | 40.50 | Harrisburg Community Unit School District 3 / 12,928 |
| 426. | 40.60 | Geneva Community Unit School District 304 / 29,710 |
| 426. | 40.60 | Rochester Community Unit School District 3A / 10,343 |
| 426. | 40.60 | Leland Community Unit School District 1 / 1,864 |
| 426. | 40.60 | Southwestern Community Unit School District 9 / 9,523 |
| 426. | 40.60 | Limestone Community High School District 310 / 22,942 |
| 426. | 40.60 | Johnsburg Community Unit School District 12 / 12,276 |
| 426. | 40.60 | Tamaroa School District 5 / 982 |
| 433. | 40.70 | Maercker School District 60 / 17,959 |
| 433. | 40.70 | Miller Township Community Consolidated School District / 2,192 |
| 433. | 40.70 | Lake Zurich Community Unit School District 95 / 31,940 |
| 433. | 40.70 | Cowden-Herrick Community Unit School District 3A / 2,445 |
| 433. | 40.70 | Meridian Community Unit School District 15 / 6,419 |
| 433. | 40.70 | Germantown School District 60 / 1,741 |
| 433. | 40.70 | Edinburg Community Unit School District 4 / 1,861 |
| 433. | 40.70 | Oglesby Elementary School District 125 / 4,783 |
| 433. | 40.70 | Lake Bluff Elementary School District 65 / 8,302 |
| 433. | 40.70 | Glen Ellyn Community Consolidated School District 89 / 22,302 |
| 433. | 40.70 | Winnetka School District 36 / 11,724 |
| 444. | 40.80 | Gavin School District 37 / 7,597 |
| 444. | 40.80 | St. Anne Community High School District 302 / 4,793 |
| 444. | 40.80 | Elementary School District 159 / 19,419 |
| 444. | 40.80 | Pontiac Township High School District 90 / 16,096 |
| 444. | 40.80 | Edgar County Community Unit District 6 / 2,323 |
| 444. | 40.80 | Mokena School District 159 / 17,167 |
| 444. | 40.80 | Vienna High School District 133 / 9,283 |
| 444. | 40.80 | Salem Community High School District 600 / 15,160 |
| 444. | 40.80 | Norris City-Omaha-Enfield Community Unit School District 3 / 4,367 |
| 444. | 40.80 | Oak Grove School District 68 / 7,184 |
| 454. | 40.90 | ROWVA Community Unit School District 208 / 4,056 |
| 454. | 40.90 | Frankfort Community Consolidated School District 157C / 17,619 |
| 454. | 40.90 | Murphysboro Community Unit School District 186 / 15,439 |
| 454. | 40.90 | Libertyville Community High School District 128 / 49,998 |
| 454. | 40.90 | Pekin Public School District108 / 34,079 |
| 454. | 40.90 | Princeville Community Unit School District 326 / 4,234 |
| 454. | 40.90 | Morrison Community Unit School District 6 / 6,761 |
| 454. | 40.90 | Midwest Central Community Unit School District 191 / 6,566 |
| 454. | 40.90 | Red Bud Community Unit School District 132 / 8,016 |
| 454. | 40.90 | Hoover-Schrum Memorial School District 157 / 8,826 |
| 454. | 40.90 | Elverado Community Unit School District 196 / 2,888 |
| 465. | 41.00 | Name N/A / 8,629 |
| 465. | 41.00 | Morton Community Unit School District 709 / 19,001 |
| 465. | 41.00 | Pana Community Unit School District 8 / 9,525 |
| 465. | 41.00 | Brookfield School District 95 / 10,951 |
| 465. | 41.00 | Mount Zion Community Unit School District 3 / 12,101 |
| 465. | 41.00 | St. Elmo Community Unit School District 202 / 2,819 |
| 465. | 41.00 | Iroquois West Community Unit School District 10 / 4,834 |
| 465. | 41.00 | Pontiac Community Consolidated School District 429 / 13,526 |
| 473. | 41.10 | Shiloh Community Unit School District 1 / 2,926 |
| 473. | 41.10 | Prairieview-Ogden Community Consolidated School District 197 / 2,341 |
| 473. | 41.10 | LaGrange School District 102 / 25,131 |
| 473. | 41.10 | Gillespie Community Unit School District 7 / 7,929 |
| 473. | 41.10 | Vienna School District 55 / 4,431 |
| 473. | 41.10 | Illini Bluffs Community Unit School District 327 / 5,690 |
| 473. | 41.10 | Lebanon Community Unit School District 9 / 5,513 |
| 473. | 41.10 | Lombard School District 44 / 34,825 |
| 473. | 41.10 | Liberty Community Unit School District 2 / 3,412 |
| 473. | 41.10 | Roselle School District 12 / 7,010 |
| 483. | 41.20 | Mount Pulaski Community Unit District 23 / 2,979 |
| 483. | 41.20 | Name N/A / 1,740 |
| 483. | 41.20 | Newark Community High School District 18 / 3,566 |
| 483. | 41.20 | Saunemin Community Consolidated School District 438 / 885 |
| 483. | 41.20 | Fremont School District 79 / 19,584 |
| 483. | 41.20 | Pawnee Community Unit School District 11 / 3,218 |
| 483. | 41.20 | Jersey Community Unit School District 100 / 20,016 |
| 483. | 41.20 | Rankin Community School District 98 / 3,279 |
| 483. | 41.20 | Reed Custer Community Unit School District 255U / 9,369 |
| 483. | 41.20 | Eldorado Community Unit School District 4 / 7,166 |
| 483. | 41.20 | Hinckley-Big Rock Community Unit School District 429 / 4,774 |
| 494. | 41.30 | Hinsdale Community Consolidated School District 181 / 25,590 |
| 494. | 41.30 | Community Unit School District 16 / 5,756 |
| 494. | 41.30 | Hillsboro Community Unit School District 3 / 14,003 |
| 494. | 41.30 | Hall High School District 502 / 9,173 |
| 494. | 41.30 | Westville Community Unit School District 2 / 6,880 |
| 494. | 41.30 | New Hope Community Consolidated School District 6 / 1,701 |
| 494. | 41.30 | New Simpson Hill Consolidated District 32 / 3,055 |
| 494. | 41.30 | Nashville Community High School District 99 / 9,049 |
| 494. | 41.30 | River Forest School District 90 / 11,174 |
| 503. | 41.40 | Dieterich Community Unit School District 30 / 2,220 |
| 503. | 41.40 | Morrisonville Community Unit School District 1 / 1,992 |
| 503. | 41.40 | Lemont-Bromberek Combined School District 113A / 25,042 |
| 503. | 41.40 | West Richland Community Unit School District 2 / 2,124 |
| 503. | 41.40 | Willow Grove School District 46 / 2,354 |
| 503. | 41.40 | Community Unit School District 4 / 4,031 |
| 503. | 41.40 | Homewood School District 153 / 15,746 |
| 503. | 41.40 | Pembroke Consolidated Community School District 259 / 1,937 |
| 511. | 41.50 | La Moille Community Unit School District 303 / 1,852 |
| 511. | 41.50 | Wesclin Community Unit School District 3 / 7,929 |
| 511. | 41.50 | Riverside Brookfield Township School District 208 / 29,140 |
| 511. | 41.50 | Lemont Township High School District 210 / 25,392 |
| 511. | 41.50 | Skokie School District 73-5 / 10,341 |
| 511. | 41.50 | Lyons Township High School District 204 / 68,460 |
| 511. | 41.50 | Ottawa Elementary School District 141 / 19,697 |
| 511. | 41.50 | Beecher Community Unit School District 200U / 6,728 |
| 519. | 41.60 | Sandoval Community Unit School District 501 / 2,607 |
| 519. | 41.60 | Nippersink School District 2 / 11,628 |
| 519. | 41.60 | Prairie Grove Community School District 46 / 7,685 |
| 519. | 41.60 | Metamora Township High School District 122 / 16,099 |
| 519. | 41.60 | Richmond-Burton Community High School District 157 / 11,628 |
| 519. | 41.60 | Cobden School Unit District 17 / 3,998 |
| 519. | 41.60 | Pleasant Hill School District 69 / 1,997 |
| 519. | 41.60 | Okaw Valley Community Unit School District 302 / 3,417 |
| 519. | 41.60 | Lockport School District 91 / 6,587 |
| 519. | 41.60 | Bureau Valley Community Unit School District 340 / 7,090 |
| 519. | 41.60 | Harmony Emge School District 175 / 10,417 |
| 519. | 41.60 | Oblong Community Unit School District 4 / 3,763 |
| 531. | 41.70 | Pikeland Community Unit School District 10 / 8,507 |
| 531. | 41.70 | Sterling Community Unit District 5 / 21,414 |
| 531. | 41.70 | Annawan Community Unit School District 226 / 2,196 |
| 531. | 41.70 | Nokomis Community Unit School District 22 / 4,427 |
| 531. | 41.70 | Maroa-Forsyth Community Unit School District 2 / 6,678 |
| 531. | 41.70 | Brownstown Community Unit School District 201 / 2,179 |
| 537. | 41.80 | Marshall Community Unit School District 2C / 8,285 |
| 537. | 41.80 | East Alton-Wood River Community High School District 14 / 13,703 |
| 537. | 41.80 | Wolf Branch School District 113 / 7,660 |
| 537. | 41.80 | Illinois Valley Central Unit School District 321 / 13,630 |
| 537. | 41.80 | Western Community Unit School District 12 / 3,791 |
| 537. | 41.80 | Oak Lawn-Hometown School District 123 / 34,761 |
| 537. | 41.80 | Newark Community Consolidated School District 66 / 2,493 |
| 544. | 41.90 | Monroe School District 70 / 3,223 |
| 544. | 41.90 | LaSalle-Peru Township High School District 120 / 29,237 |
| 544. | 41.90 | Fieldcrest Community Unit School District 6 / 7,089 |
| 544. | 41.90 | Meridian Community Unit School District 101 / 3,462 |
| 544. | 41.90 | Joppa-Maple Grove Unit District 38 / 1,481 |
| 544. | 41.90 | Dimmick Community Consolidated School District 175 / 1,128 |
| 544. | 41.90 | Benton Consolidated High School District 103 / 12,657 |
| 544. | 41.90 | Norwood Elementary School District 63 / 4,120 |
| 544. | 41.90 | Elwood Community Consolidated School District 203 / 3,514 |
| 544. | 41.90 | Zeigler-Royalton Community Unit School District 188 / 4,069 |
| 544. | 41.90 | Dixon Unit School District 170 / 22,927 |
| 544. | 41.90 | Pleasant Plains Community Unit School District 8 / 8,112 |
| 556. | 42.00 | Frankfort Community Unit School District 168 / 11,994 |
| 556. | 42.00 | Ladd Community Consolidated School District 94 / 1,572 |
| 556. | 42.00 | Wilmington Community Unit School District 209U / 9,554 |
| 556. | 42.00 | Hoopeston Area Community Unit School District 11 / 7,157 |
| 556. | 42.00 | Morton Grove School District 70 / 9,084 |
| 556. | 42.00 | Dodds Community Consolidated School District 7 / 1,490 |
| 556. | 42.00 | Gibson City-Melvin-Sibley Community Unit School District 5 / 5,984 |
| 556. | 42.00 | Sangamon Valley Community Unit School District 9 / 4,232 |
| 556. | 42.00 | Homewood-Flossmoor Community High School District 233 / 38,230 |
| 565. | 42.10 | Riverside School District 96 / 13,631 |
| 565. | 42.10 | Millstadt Consolidated Community School District 160 / 8,886 |
| 565. | 42.10 | Benton Community Consolidated School District 47 / 10,110 |
| 565. | 42.10 | Central A & M Community Unit School District 21 / 4,819 |
| 565. | 42.10 | Downers Grove Grade School District 58 / 52,346 |
| 565. | 42.10 | Waverly Community Unit School District 6 / 2,031 |
| 565. | 42.10 | Germantown Hills School District 69 / 6,225 |
| 565. | 42.10 | Carlinville Community Unit School District 1 / 9,554 |
| 565. | 42.10 | Westmont Community Unit School District 201 / 12,521 |
| 565. | 42.10 | Somonauk Community Unit School District 432 / 4,873 |
| 565. | 42.10 | Spring Lake Community Consolidated School District 606 / 736 |
| 576. | 42.20 | Geff Community Consolidated School District 14 / 974 |
| 576. | 42.20 | Massac Unit School District 1 / 13,833 |
| 576. | 42.20 | Flossmoor School District 161 / 22,158 |
| 576. | 42.20 | Western Springs School District 101 / 10,047 |
| 576. | 42.20 | Forrestville Valley Community Unit School District 221 / 5,398 |
| 576. | 42.20 | Jamaica Community Unit School District 12 / 2,392 |
| 576. | 42.20 | Kings Consolidated School District 144 / 1,023 |
| 583. | 42.30 | Farmington Central Community Unit School District 265 / 8,236 |
| 583. | 42.30 | Lincoln Elementary School District 27 / 12,793 |
| 583. | 42.30 | Iuka Community Consolidated School District 7 / 1,991 |
| 583. | 42.30 | Warsaw Community Unit School District 316 / 2,841 |
| 583. | 42.30 | Christopher Community Unit School District 99 / 4,575 |
| 583. | 42.30 | Bushnell-Prairie City Community Unit School District 170 / 4,431 |
| 583. | 42.30 | Fisher Community Unit School District 1 / 3,455 |
| 590. | 42.40 | Adlai E. Stevenson High School District 125 / 60,968 |
| 590. | 42.40 | Skokie School District 69 / 18,384 |
| 590. | 42.40 | Hillside School District 93 / 5,234 |
| 590. | 42.40 | Ottawa Township High School District 140 / 31,742 |
| 594. | 42.50 | Amboy Community Unit School District 272 / 5,277 |
| 594. | 42.50 | Kildeer Countryside Community Consolidated School District 96 / 22,875 |
| 594. | 42.50 | Monticello Community Unit School District 25 / 8,976 |
| 594. | 42.50 | Argenta-Oreana Community Unit School District 1 / 3,906 |
| 594. | 42.50 | DeLand-Weldon Community Unit School District 57 / 1,485 |
| 594. | 42.50 | Jasper County Community Unit School District 1 / 9,433 |
| 594. | 42.50 | Marion Community Unit School District 2 / 28,098 |
| 594. | 42.50 | Waterloo Community Unit School District 5 / 17,334 |
| 594. | 42.50 | Aptakisic-Tripp Community Consolidated School District / 18,655 |
| 594. | 42.50 | Olympia Community Unit School District 16 / 11,473 |
| 604. | 42.60 | Gifford Community Consolidated School District 188 / 1,792 |
| 604. | 42.60 | Woodland Community Unit School District 5 / 2,848 |
| 604. | 42.60 | Mount Olive Community Unit School District 5 / 3,490 |
| 607. | 42.70 | Williamsville Community Unit School District 15 / 7,589 |
| 607. | 42.70 | East Maine School District 63 / 46,697 |
| 607. | 42.70 | Lisle Community Unit School District 202 / 13,968 |
| 607. | 42.70 | Warrensburg-Latham Community Unit District 11 / 6,092 |
| 607. | 42.70 | Peotone Community Unit School District 207U / 10,989 |
| 607. | 42.70 | Centralia High School District 200 / 21,582 |
| 607. | 42.70 | Libertyville School District 70 / 18,417 |
| 614. | 42.80 | Ridgeview Community Unit School District 19 / 3,675 |
| 614. | 42.80 | Arlington Heights School District 25 / 50,272 |
| 614. | 42.80 | Potomac Community Unit School District 10 / 1,458 |
| 614. | 42.80 | Consolidated High School District 230 / 154,708 |
| 614. | 42.80 | Centralia School District 135 / 13,480 |
| 614. | 42.80 | Rock Falls Township High School District 301 / 14,683 |
| 614. | 42.80 | Itasca School District 10 / 8,919 |
| 614. | 42.80 | Athens Community Unit School District 213 / 5,051 |
| 622. | 42.90 | Elmwood Community Unit School District 322 / 4,113 |
| 622. | 42.90 | Damiansville School District 62 / 788 |
| 622. | 42.90 | Erie Community Unit School District 1 / 3,452 |
| 622. | 42.90 | Taylorville Community Unit School District 3 / 18,710 |
| 622. | 42.90 | Hollis Consolidated School District 328 / 760 |
| 622. | 42.90 | Cypress School District 64 / 1,083 |
| 622. | 42.90 | Brimfield Community Unit School District 309 / 3,489 |
| 622. | 42.90 | Maine Township High School District 207 / 144,996 |
| 622. | 42.90 | Robinson Community Unit School District 2 / 11,990 |
| 622. | 42.90 | Beecher City Community Unit School District 20 / 2,588 |
| 622. | 42.90 | Coulterville Unit School District 1 / 1,653 |
| 622. | 42.90 | Clinton Community Unit School District 15 / 11,849 |
| 634. | 43.00 | Mercer County School District 404 / 8,490 |
| 634. | 43.00 | Geneseo Community Unit School District 228 / 15,497 |
| 634. | 43.00 | Hamilton County Community Unit School District 10 / 7,826 |
| 634. | 43.00 | River Trails School District 26 / 16,282 |
| 634. | 43.00 | Grant Community Consolidated School District 110 / 7,563 |
| 639. | 43.10 | Franklin Community Unit School District 1 / 2,005 |
| 639. | 43.10 | Putnam County Community Unit School District 535 / 5,455 |
| 639. | 43.10 | Deerfield School District 109 / 20,914 |
| 639. | 43.10 | Township High School District 113 / 58,731 |
| 639. | 43.10 | Pinckneyville School District 50 / 6,670 |
| 639. | 43.10 | Country Club Hills School District 160 / 12,286 |
| 639. | 43.10 | Glenview Community Consolidated School District 34 / 39,997 |
| 639. | 43.10 | Egyptian Community Unit School District 5 / 3,817 |
| 647. | 43.20 | Carthage Elementary School District 317 / 4,296 |
| 647. | 43.20 | Mount Prospect School District 57 / 19,665 |
| 647. | 43.20 | Winthrop Harbor School District 1 / 6,689 |
| 647. | 43.20 | Edwards County Community Unit School District 1 / 5,959 |
| 651. | 43.30 | Sesser-Valier Community Unit School District 196 / 4,199 |
| 651. | 43.30 | Villa Grove Community Unit School District 302 / 4,079 |
| 651. | 43.30 | Venice Community Unit School District 3 / 794 |
| 654. | 43.40 | Hinsdale Township High School District 86 / 74,930 |
| 654. | 43.40 | Glencoe School District 35 / 8,629 |
| 654. | 43.40 | Momence Community Unit School District 1 / 7,391 |
| 654. | 43.40 | Pleasantdale School District 107 / 7,984 |
| 654. | 43.40 | East Dubuque Community Unit School District 119 / 4,461 |
| 654. | 43.40 | East Alton School District 13 / 7,403 |
| 654. | 43.40 | Wabash Community Unit School District 348 / 10,870 |
| 654. | 43.40 | Ashley Community Consolidated School District 15 / 2,130 |
| 654. | 43.40 | Marseilles Elementary School District 150 / 4,452 |
| 654. | 43.40 | Barrington Community Unit School District 220 / 44,632 |
| 654. | 43.40 | Orion Community Unit School District 223 / 6,330 |
| 665. | 43.50 | Wilmette School District 39 / 25,592 |
| 665. | 43.50 | Neoga Community Unit School District 3 / 5,011 |
| 665. | 43.50 | East Richland Community Unit School District 1 / 14,098 |
| 665. | 43.50 | Schuyler-Industry Community Unit School District 5 / 7,910 |
| 669. | 43.60 | Atwood-Hammond Community Unit School District 39 / 2,352 |
| 669. | 43.60 | Hampton School District 29 / 2,419 |
| 669. | 43.60 | Waltham Community Consolidated School District 185 / 2,311 |
| 672. | 43.70 | Thornton School District 154 / 3,053 |
| 672. | 43.70 | Litchfield Community Unit School District 12 / 8,902 |
| 672. | 43.70 | V.I.T. Community Unit School District 2 / 2,373 |
| 672. | 43.70 | Fairfield Community High School District 225 / 10,231 |
| 672. | 43.70 | North Shore School District 112 / 35,742 |
| 672. | 43.70 | High Mount School District 116 / 3,993 |
| 672. | 43.70 | Calhoun Community Unit School District 40 / 3,386 |
| 672. | 43.70 | Rondout School District 72 / 1,633 |
| 680. | 43.80 | North Clay Community Unit School District 25 / 3,858 |
| 680. | 43.80 | Westchester School District 92-5 / 16,134 |
| 680. | 43.80 | New Trier Township High School District 203 / 59,899 |
| 680. | 43.80 | Herscher Community Unit School District 2 / 10,714 |
| 680. | 43.80 | Steeleville Community Unit School District 138 / 2,829 |
| 685. | 43.90 | Orland School District 135 / 54,404 |
| 685. | 43.90 | Paxton-Buckley-Loda Community Unit School District 10 / 8,867 |
| 685. | 43.90 | North Wayne Community Unit School District 200 / 2,671 |
| 685. | 43.90 | Winchester Community Unit School District 1 / 3,787 |
| 689. | 44.00 | Blue Ridge Community Unit School District 18 / 5,559 |
| 689. | 44.00 | Oakdale Community Consolidated School District 1 / 684 |
| 689. | 44.00 | Freeport School District 145 / 30,458 |
| 689. | 44.00 | Casey-Westfield Community Unit School District 4C / 5,945 |
| 689. | 44.00 | Riverdale Community Unit School District 100 / 6,633 |
| 689. | 44.00 | Crab Orchard Community Unit School District 3 / 2,480 |
| 695. | 44.10 | Camp Point Community Unit School District 3 / 4,941 |
| 695. | 44.10 | Galva Community Unit School District 224 / 3,728 |
| 695. | 44.10 | Fox Lake Grade School District 114 / 8,600 |
| 695. | 44.10 | Porta Community Unit School District 202 / 7,357 |
| 695. | 44.10 | Irvington County Community Unit School District 11 / 804 |
| 695. | 44.10 | Shawnee Community Unit School District 84 / 2,700 |
| 701. | 44.20 | Field Community Consolidated School District 3 / 2,688 |
| 701. | 44.20 | Park Ridge Consolidated Community School District 64 / 40,721 |
| 701. | 44.20 | Eswood Community Consolidated District 269 / 874 |
| 701. | 44.20 | Greenview Community Unit School District 200 / 1,610 |
| 701. | 44.20 | Anna Jonesboro Community High School District 81 / 11,122 |
| 701. | 44.20 | Freeburg Community Consolidated School District 70 / 7,648 |
| 701. | 44.20 | United Community School District 304 / 6,122 |
| 701. | 44.20 | Peoria Heights Community Unit School District 325 / 6,777 |
| 701. | 44.20 | Prospect Heights School District 23 / 18,620 |
| 701. | 44.20 | Heritage Community Unit School District 8 / 2,989 |
| 711. | 44.30 | Windsor Community Unit School District 1 / 2,800 |
| 711. | 44.30 | Smithton Community Consolidated School District 130 / 4,206 |
| 711. | 44.30 | Freeburg Community High School District 77 / 12,715 |
| 711. | 44.30 | Emmons School District 33 / 3,438 |
| 711. | 44.30 | Knoxville Community Unit School District 202 / 6,138 |
| 711. | 44.30 | Deer Park Community Consolidated School District 82 / 757 |
| 717. | 44.40 | Woodlawn Community High School District 205 / 3,271 |
| 717. | 44.40 | Union Ridge School District 86 / 6,160 |
| 717. | 44.40 | Darien School District 61 / 15,844 |
| 717. | 44.40 | Peru Elementary School District 124 / 10,388 |
| 721. | 44.50 | Mulberry Grove Community Unit School District 1 / 2,453 |
| 721. | 44.50 | Stewardson-Strasburg Community Unit District 5A / 2,456 |
| 721. | 44.50 | West Washington County Community Unit District 10 / 4,079 |
| 721. | 44.50 | Riley Community Consolidated School District 18 / 3,638 |
| 721. | 44.50 | Lawrence County Community Unit District 20 / 7,923 |
| 726. | 44.70 | Lake Forest Community High School District 115 / 27,370 |
| 726. | 44.70 | Hartsburg-Emden Community Unit School District 21 / 1,003 |
| 726. | 44.70 | Tri-Point Community Unit School District 6-J / 2,841 |
| 729. | 44.80 | Illini West High School District 307 / 8,441 |
| 729. | 44.80 | Hamilton Community Consolidated School District 328 / 3,924 |
| 731. | 44.90 | Dallas Elementary School District 327 / 2,017 |
| 731. | 44.90 | Montmorency Community Consolidated School District 145 / 2,521 |
| 731. | 44.90 | Kell Consolidated School District 2 / 904 |
| 731. | 44.90 | Robein School District 85 / 2,008 |
| 735. | 45.00 | Milford Township High School District 233 / 3,908 |
| 735. | 45.00 | Milford Community Consolidated School District 280 / 3,908 |
| 735. | 45.00 | Sherrard Community Unit School District 200 / 9,578 |
| 735. | 45.00 | Havana Community Unit School District 126 / 6,562 |
| 735. | 45.00 | Northfield Township High School District 225 / 85,444 |
| 735. | 45.00 | Abingdon Community Unit School District 217 / 3,967 |
| 741. | 45.10 | Carmi-White County Community Unit School District 5 / 9,412 |
| 741. | 45.10 | Lincolnshire-Prairieview School District 103 / 12,991 |
| 741. | 45.10 | Lick Creek Community Consolidated School District 16 / 1,351 |
| 744. | 45.20 | New Holland-Middletown Elementary School District 88 / 989 |
| 744. | 45.20 | Staunton Community Unit School District 6 / 8,256 |
| 744. | 45.20 | Winfield School District 34 / 4,102 |
| 744. | 45.20 | Bismarck-Henning Consolidated Unit School District / 4,747 |
| 744. | 45.20 | St. Libory Consolidated School District 30 / 857 |
| 744. | 45.20 | Sparta Community Unit School District 140 / 8,677 |
| 744. | 45.20 | South Holland School District 150 / 10,277 |
| 744. | 45.20 | Ridgewood Community High School District 234 / 19,090 |
| 752. | 45.30 | Northbrook School District 28 / 14,240 |
| 752. | 45.30 | Rooks Creek Community Consolidated School District 425 / 475 |
| 752. | 45.30 | Center Cass School District 66 / 11,025 |
| 752. | 45.30 | Bunker Hill Community Unit School District 8 / 4,291 |
| 752. | 45.30 | Roanoke-Benson Community Unit School District 60 / 3,403 |
| 757. | 45.40 | Riverdale School District 14 / 1,378 |
| 757. | 45.40 | Stockton Community Unit School District 206 / 3,941 |
| 757. | 45.40 | Patoka Community Unit School District 100 / 1,541 |
| 760. | 45.50 | Skokie-Fairview School District 72 / 6,009 |
| 760. | 45.50 | Iroquois County Community Unit School District 9 / 7,216 |
| 760. | 45.50 | Sullivan Community Unit School District 300 / 7,390 |
| 760. | 45.50 | Niles Township Community High School District 219 / 95,129 |
| 760. | 45.50 | River Bend Community Unit District 2 / 6,692 |
| 760. | 45.50 | Martinsville Community Unit School District 3C / 2,262 |
| 760. | 45.50 | Hoyleton Consolidated School District 29 / 898 |
| 760. | 45.50 | Polo Community Unit School District 222 / 4,138 |
| 760. | 45.50 | Griggsville-Perry Community Unit School District 4 / 2,185 |
| 760. | 45.50 | Woodlawn Community Consolidated School District 4 / 2,678 |
| 760. | 45.50 | Gallatin Community Unit School District 7 / 5,403 |
| 760. | 45.50 | Century Community Unit School District 100 / 2,732 |
| 772. | 45.60 | Stark County Community Unit School District 100 / 4,624 |
| 772. | 45.60 | Southeastern Community Unit School District 337 / 3,227 |
| 772. | 45.60 | Wallace Community Consolidated School District 195 / 2,858 |
| 772. | 45.60 | Leepertown Community Consolidated School District 175 / 385 |
| 772. | 45.60 | Benjamin School District 25 / 6,264 |
| 777. | 45.70 | Warren Community Unit School District 205 / 2,974 |
| 777. | 45.70 | Cissna Park Community Unit School District 6 / 1,927 |
| 777. | 45.70 | Dakota Community Unit School District 201 / 4,710 |
| 780. | 45.80 | Midland Community Unit School District 7 / 5,353 |
| 780. | 45.80 | Triopia Community Unit School District 27 / 2,227 |
| 780. | 45.80 | Brussels Community Unit School District 42 / 1,347 |
| 780. | 45.80 | Fairfield Public School District 112 / 5,939 |
| 784. | 45.90 | Hardin County Community Unit School District 1 / 4,315 |
| 784. | 45.90 | Golf Elementary School District 67 / 6,489 |
| 784. | 45.90 | Grand Prairie Community Consolidated School District 6 / 860 |
| 784. | 45.90 | Carrollton Community Unit School District 1 / 4,067 |
| 788. | 46.00 | Anna Community Consolidated School District 37 / 6,790 |
| 788. | 46.00 | Ashton Community Unit School District 275 / 4,188 |
| 788. | 46.00 | Shelbyville Community Unit School District 4 / 7,879 |
| 788. | 46.00 | Durand Community Unit School District 322 / 3,955 |
| 792. | 46.10 | Norridge School District 80 / 12,332 |
| 792. | 46.10 | Virginia Community Unit School District 64 / 2,185 |
| 792. | 46.10 | Alden-Hebron School District 19 / 2,607 |
| 792. | 46.10 | Lake Forest School District 67 / 18,836 |
| 792. | 46.10 | Crescent Iroquois Community Unit School District 249 / 1,017 |
| 792. | 46.10 | Willow Springs School District 108 / 3,221 |
| 798. | 46.20 | Illini Central Community Unit School District 189 / 4,735 |
| 798. | 46.20 | Lena-Winslow Community Unit School District 202 / 4,878 |
| 798. | 46.20 | West Carroll Community Unit School District 314 / 8,816 |
| 801. | 46.30 | Fulton County Community Unit School District 3 / 3,738 |
| 802. | 46.40 | Cass School District 63 / 8,627 |
| 802. | 46.40 | West Prairie Community Unit School District 103 / 4,681 |
| 802. | 46.40 | Alwood Community Unit School District 225 / 2,276 |
| 802. | 46.40 | Tri-City Community Unit School District 1 / 2,974 |
| 806. | 46.50 | La Harpe Community School District 347 / 2,128 |
| 806. | 46.50 | Flanagan-Cornell District 74 / 1,723 |
| 808. | 46.60 | Allen Township Community Consolidated School District 65 / 895 |
| 809. | 46.80 | Princeton High School District 500 / 12,433 |
| 809. | 46.80 | Raccoon Consolidated School District 1 / 2,245 |
| 811. | 46.90 | East Prairie School District 73 / 4,203 |
| 811. | 46.90 | West Central Community Unit School District 235 / 6,393 |
| 811. | 46.90 | Riverview Consolidated Community School District 2 / 2,927 |
| 814. | 47.00 | Meredosia-Chambersburg Community Unit School District 11 / 1,616 |
| 815. | 47.20 | Northbrook Elementary School District 27 / 10,687 |
| 815. | 47.20 | Bloomingdale School District 13 / 13,287 |
| 815. | 47.20 | Lincolnwood School District 74 / 12,538 |
| 818. | 47.30 | Wethersfield Community Unit School District 230 / 3,967 |
| 818. | 47.30 | Armstrong Township High School District 225 / 1,315 |
| 818. | 47.30 | Nauvoo-Colusa Community Unit School District 325 / 2,155 |
| 818. | 47.30 | Northbrook/Glenview School District 30 / 10,753 |
| 822. | 47.40 | Summersville School District 79 / 1,948 |
| 822. | 47.40 | Kansas Community Unit School District 3 / 1,549 |
| 822. | 47.40 | Rome Community Consolidated School District 2 / 2,412 |
| 822. | 47.40 | Rockridge Community Unit School District 300 / 7,258 |
| 822. | 47.40 | Richland School District 88A / 10,078 |
| 827. | 47.50 | Goreville Community Unit School District 1 / 3,411 |
| 827. | 47.50 | Oregon Community Unit School District 220 / 10,621 |
| 829. | 47.60 | Pennoyer School District 79 / 5,752 |
| 829. | 47.60 | Lewistown Community Unit School District 97 / 4,876 |
| 829. | 47.60 | Shirland Community Consolidated School District 134 / 1,353 |
| 829. | 47.60 | Grayville Community Unit School District 1 / 1,937 |
| 829. | 47.60 | Skokie School District 68 / 20,021 |
| 834. | 47.70 | Cherry School District 92 / 440 |
| 834. | 47.70 | Princeton Elementary School District 115 / 11,469 |
| 834. | 47.70 | Fairmont School District 89 / 3,800 |
| 837. | 47.80 | Cerro Gordo Community Unit School District 100 / 3,021 |
| 838. | 47.90 | Pope County Community Unit School District 1 / 4,399 |
| 839. | 48.10 | West Northfield School District 31 / 9,767 |
| 839. | 48.10 | Henry-Senachwine Consolidated Unit School District 5 / 3,791 |
| 839. | 48.10 | Lindop School District 92 / 4,065 |
| 842. | 48.20 | Avoca School District 37 / 6,689 |
| 842. | 48.20 | Armstrong-Ellis Consolidated School District 61 / 818 |
| 844. | 48.40 | Palos Heights School District 128 / 9,820 |
| 845. | 48.50 | Gower School District 62 / 9,784 |
| 846. | 48.60 | Limestone Walters Community Consolidated School District 316 / 1,753 |
| 846. | 48.60 | Eastland Community Unit School District 308 / 4,258 |
| 848. | 49.00 | Galena Unit School District 120 / 5,910 |
| 849. | 49.10 | Paris Community Unit School District 4 / 4,200 |
| 850. | 49.40 | East Coloma School District 12 / 2,578 |
| 850. | 49.40 | Carrier Mills-Stonefort Community Unit School District / 2,700 |
| 850. | 49.40 | Salt Creek School District 48 / 8,045 |
| 853. | 49.50 | Nettle Creek Community Consolidated School District 24C / 805 |
| 853. | 49.50 | Grass Lake School District 36 / 2,523 |
| 855. | 49.80 | Oakland Community Unit School District 5 / 1,740 |
| 856. | 50.00 | Clay City Community Unit District 10 / 2,309 |
| 856. | 50.00 | Rutland Community Consolidated School District 230 / 747 |
| 858. | 50.70 | LaGrange Highlands School District 106 / 8,973 |
| 859. | 51.10 | River Ridge Community Unit School District 210 / 3,681 |
| 860. | 51.30 | Akin Community Consolidated School District 91 / 775 |
| 861. | 51.40 | Avon Community Unit School District 176 / 1,594 |
| 862. | 51.50 | Palos Community Consolidated School District 118 / 23,105 |
| 863. | 51.60 | Sunset Ridge School District 29 / 4,151 |
| 864. | 52.00 | Williamsfield Community Unit School District 210 / 1,726 |
| 865. | 52.10 | Niles Elementary School District 71 / 8,060 |
| 866. | 54.40 | Scales Mound Community Unit School District 211 / 1,677 |
| 867. | 56.80 | Flanagan-Cornell District 74 in Pontiac / 54 |
| 868. | 56.90 | Butler School District 53 / 4,467 |
| 869. | 80.30 | Flanagan-Cornell District 74 in Rooks Creek / 3 |
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.
