

A focus on "some college, no degree" can improve state college attainment rates. More: Illinois PDF
| County | Percent w/college degree | Number w/college degree | Total population (ages 25-34) | < 9th grade | 9th-12th grade, no diploma | High school grad/GED | Some college, no degree | Associate's degree | Bachelor's degree | Graduate degree |
| TOTAL | 39.7% | 714,086 | 1,798,840 | 89,097 | 182,499 | 412,452 | 400,706 | 133,420 | 422,376 | 158,290 |
| Champaign | 56.9% | 15,105 | 26,534 | 294 | 889 | 4,419 | 5,827 | 2,081 | 7,511 | 5,513 |
| DuPage | 55.1% | 72,134 | 131,006 | 4,984 | 7,154 | 20,800 | 25,934 | 8,632 | 47,351 | 16,151 |
| McLean | 54.1% | 11,484 | 21,230 | 199 | 771 | 3,918 | 4,858 | 1,902 | 7,674 | 1,908 |
| Jackson | 49.5% | 4,132 | 8,340 | 70 | 454 | 1,502 | 2,182 | 865 | 2,222 | 1,045 |
| DeKalb | 44.1% | 5,346 | 12,115 | 271 | 801 | 2,750 | 2,947 | 1,307 | 3,061 | 978 |
| Sangamon | 43.2% | 10,728 | 24,825 | 149 | 1,711 | 6,211 | 6,026 | 2,170 | 6,561 | 1,997 |
| Lake | 42.4% | 36,897 | 87,039 | 5,931 | 8,070 | 18,277 | 17,864 | 4,961 | 23,671 | 8,265 |
| Monroe | 42.3% | 1,394 | 3,295 | 22 | 75 | 781 | 1,023 | 349 | 673 | 372 |
| Woodford | 41.9% | 1,577 | 3,764 | 35 | 159 | 986 | 1,007 | 444 | 919 | 214 |
| Cook | 41.7% | 361,335 | 865,983 | 57,799 | 97,205 | 176,924 | 172,720 | 50,990 | 215,365 | 94,980 |
| Kendall | 41.0% | 3,235 | 7,890 | 145 | 296 | 1,902 | 2,312 | 800 | 2,033 | 402 |
| McHenry | 40.3% | 14,951 | 37,134 | 1,462 | 2,365 | 9,223 | 9,133 | 3,286 | 9,440 | 2,225 |
| McDonough | 40.2% | 1,305 | 3,247 | 31 | 198 | 917 | 796 | 225 | 728 | 352 |
| Richland | 39.5% | 709 | 1,796 | 11 | 100 | 491 | 485 | 381 | 276 | 52 |
| Peoria | 39.2% | 9,394 | 23,957 | 391 | 2,200 | 5,560 | 6,412 | 2,092 | 5,446 | 1,856 |
| Will | 38.7% | 28,572 | 73,857 | 1,712 | 5,991 | 18,280 | 19,302 | 6,662 | 17,626 | 4,284 |
| Washington | 36.6% | 626 | 1,710 | 30 | 60 | 530 | 464 | 326 | 233 | 67 |
| Coles | 36.6% | 2,162 | 5,910 | 99 | 491 | 1,550 | 1,608 | 695 | 1,077 | 390 |
| Henry | 36.3% | 2,040 | 5,620 | 92 | 392 | 1,512 | 1,584 | 762 | 1,072 | 206 |
| Madison | 35.6% | 11,903 | 33,424 | 351 | 2,791 | 8,302 | 10,077 | 3,975 | 6,274 | 1,654 |
| Menard | 35.6% | 486 | 1,365 | 26 | 62 | 508 | 283 | 136 | 303 | 47 |
| Clinton | 35.0% | 1,620 | 4,626 | 156 | 450 | 1,252 | 1,148 | 707 | 816 | 97 |
| Hancock | 34.9% | 745 | 2,133 | 15 | 110 | 774 | 489 | 296 | 409 | 40 |
| Wabash | 34.7% | 480 | 1,385 | 13 | 113 | 402 | 377 | 295 | 157 | 28 |
| Piatt | 34.4% | 608 | 1,765 | 14 | 81 | 501 | 561 | 222 | 292 | 94 |
| Effingham | 34.4% | 1,429 | 4,152 | 41 | 362 | 1,223 | 1,097 | 661 | 610 | 158 |
| Kane | 34.3% | 20,710 | 60,392 | 6,400 | 7,806 | 13,239 | 12,237 | 4,162 | 12,991 | 3,557 |
| Clay | 33.8% | 562 | 1,664 | 18 | 102 | 587 | 395 | 326 | 199 | 37 |
| Jasper | 33.0% | 343 | 1,039 | 7 | 54 | 391 | 244 | 200 | 126 | 17 |
| Tazewell | 32.9% | 5,364 | 16,307 | 170 | 1,196 | 4,895 | 4,682 | 1,719 | 2,995 | 650 |
| Union | 32.9% | 695 | 2,115 | 94 | 205 | 593 | 528 | 216 | 333 | 146 |
| Williamson | 32.7% | 2,593 | 7,927 | 57 | 689 | 2,170 | 2,418 | 985 | 1,245 | 363 |
| Adams | 32.5% | 2,540 | 7,804 | 113 | 510 | 2,477 | 2,164 | 823 | 1,452 | 265 |
| Morgan | 31.9% | 1,364 | 4,278 | 102 | 691 | 1,247 | 874 | 330 | 842 | 192 |
| Stark | 31.8% | 227 | 713 | 5 | 35 | 225 | 221 | 75 | 133 | 19 |
| Ford | 31.7% | 479 | 1,511 | 25 | 94 | 455 | 458 | 193 | 256 | 30 |
| St. Clair | 31.4% | 10,277 | 32,691 | 556 | 3,085 | 8,935 | 9,838 | 3,287 | 5,194 | 1,796 |
| Jersey | 30.5% | 741 | 2,428 | 7 | 107 | 862 | 711 | 325 | 331 | 85 |
| Saline | 30.3% | 877 | 2,894 | 39 | 295 | 774 | 909 | 473 | 281 | 123 |
| Hamilton | 30.3% | 272 | 898 | 12 | 62 | 300 | 252 | 132 | 103 | 37 |
| Calhoun | 30.2% | 173 | 572 | 3 | 17 | 222 | 157 | 94 | 72 | 7 |
| Rock Island | 30.0% | 5,488 | 18,290 | 580 | 2,282 | 4,844 | 5,096 | 1,905 | 3,006 | 577 |
| Winnebago | 29.8% | 11,279 | 37,905 | 1,249 | 4,575 | 11,680 | 9,122 | 3,327 | 6,506 | 1,446 |
| Stephenson | 29.5% | 1,730 | 5,864 | 91 | 398 | 1,910 | 1,735 | 536 | 983 | 211 |
| Wayne | 29.0% | 566 | 1,952 | 12 | 199 | 687 | 488 | 361 | 176 | 29 |
| Grundy | 28.9% | 1,391 | 4,809 | 84 | 335 | 1,549 | 1,450 | 451 | 738 | 202 |
| Franklin | 28.8% | 1,319 | 4,584 | 102 | 538 | 1,319 | 1,306 | 538 | 650 | 131 |
| Clark | 28.5% | 564 | 1,980 | 14 | 231 | 718 | 453 | 258 | 247 | 59 |
| Jo Daviess | 28.4% | 667 | 2,345 | 41 | 124 | 943 | 570 | 234 | 321 | 112 |
| Ogle | 28.1% | 1,689 | 6,009 | 276 | 678 | 1,841 | 1,525 | 588 | 879 | 222 |
| Kankakee | 28.0% | 3,762 | 13,430 | 469 | 1,349 | 4,169 | 3,681 | 1,276 | 1,883 | 603 |
| Bureau | 27.7% | 1,112 | 4,017 | 76 | 317 | 1,389 | 1,123 | 463 | 551 | 98 |
| Cumberland | 27.3% | 381 | 1,396 | 8 | 91 | 601 | 315 | 192 | 158 | 31 |
| Macoupin | 27.3% | 1,513 | 5,551 | 93 | 482 | 1,878 | 1,585 | 665 | 702 | 146 |
| Macon | 27.1% | 3,504 | 12,922 | 248 | 1,315 | 4,128 | 3,727 | 985 | 2,098 | 421 |
| Moultrie | 26.7% | 419 | 1,568 | 145 | 98 | 510 | 396 | 158 | 199 | 62 |
| Hardin | 26.7% | 144 | 539 | 15 | 119 | 129 | 132 | 80 | 54 | 10 |
| Knox | 26.2% | 1,766 | 6,744 | 87 | 1,090 | 1,866 | 1,935 | 577 | 910 | 279 |
| Lawrence | 26.1% | 454 | 1,738 | 46 | 165 | 692 | 381 | 247 | 161 | 46 |
| Mercer | 25.9% | 476 | 1,841 | 8 | 131 | 609 | 617 | 193 | 231 | 52 |
| Marion | 25.7% | 1,259 | 4,895 | 79 | 459 | 1,634 | 1,464 | 519 | 615 | 125 |
| Massac | 25.6% | 485 | 1,892 | 36 | 182 | 685 | 504 | 213 | 228 | 44 |
| Marshall | 25.5% | 363 | 1,423 | 3 | 92 | 544 | 421 | 134 | 194 | 35 |
| De Witt | 25.5% | 526 | 2,063 | 25 | 198 | 794 | 520 | 178 | 334 | 14 |
| Crawford | 25.5% | 666 | 2,613 | 33 | 565 | 816 | 533 | 379 | 230 | 57 |
| Jefferson | 25.4% | 1,313 | 5,160 | 130 | 777 | 1,529 | 1,411 | 585 | 556 | 172 |
| Shelby | 25.2% | 637 | 2,524 | 42 | 114 | 1,080 | 651 | 190 | 356 | 91 |
| Fulton | 25.0% | 1,246 | 4,982 | 118 | 876 | 1,385 | 1,357 | 568 | 595 | 83 |
| Mason | 24.9% | 452 | 1,815 | 40 | 169 | 654 | 500 | 223 | 209 | 20 |
| Edwards | 24.6% | 197 | 801 | 9 | 43 | 319 | 233 | 112 | 74 | 11 |
| Iroquois | 24.6% | 811 | 3,300 | 89 | 260 | 1,091 | 1,049 | 312 | 420 | 79 |
| Edgar | 24.4% | 543 | 2,221 | 49 | 295 | 820 | 514 | 261 | 259 | 23 |
| La Salle | 24.3% | 3,201 | 13,156 | 272 | 1,623 | 4,899 | 3,161 | 1,191 | 1,604 | 406 |
| Warren | 24.3% | 504 | 2,076 | 35 | 267 | 709 | 561 | 154 | 301 | 49 |
| Douglas | 24.2% | 541 | 2,239 | 266 | 172 | 747 | 513 | 209 | 286 | 46 |
| Putnam | 24.2% | 158 | 654 | 5 | 46 | 222 | 223 | 55 | 92 | 11 |
| Scott | 23.8% | 149 | 626 | 3 | 54 | 251 | 169 | 42 | 105 | 2 |
| Henderson | 23.5% | 198 | 841 | 12 | 59 | 354 | 218 | 94 | 87 | 17 |
| Pope | 23.4% | 96 | 410 | 3 | 71 | 146 | 94 | 37 | 40 | 19 |
| White | 23.3% | 359 | 1,541 | 32 | 193 | 564 | 393 | 168 | 161 | 30 |
| Whiteside | 22.8% | 1,641 | 7,211 | 288 | 567 | 2,688 | 2,027 | 688 | 801 | 152 |
| Carroll | 21.9% | 379 | 1,727 | 5 | 102 | 730 | 511 | 123 | 186 | 70 |
| Vermilion | 21.9% | 2,233 | 10,191 | 200 | 1,652 | 3,473 | 2,633 | 951 | 1,071 | 211 |
| Perry | 21.8% | 680 | 3,123 | 168 | 704 | 843 | 728 | 370 | 251 | 59 |
| Boone | 21.8% | 1,218 | 5,594 | 293 | 735 | 1,888 | 1,460 | 474 | 544 | 200 |
| Greene | 21.7% | 367 | 1,689 | 36 | 174 | 625 | 487 | 165 | 170 | 32 |
| Lee | 21.5% | 1,000 | 4,662 | 122 | 862 | 1,502 | 1,176 | 438 | 479 | 83 |
| Livingston | 21.3% | 1,109 | 5,206 | 182 | 1,138 | 1,771 | 1,006 | 399 | 586 | 124 |
| Bond | 20.6% | 495 | 2,399 | 30 | 839 | 638 | 397 | 183 | 214 | 98 |
| Randolph | 20.2% | 956 | 4,738 | 146 | 1,133 | 1,397 | 1,106 | 455 | 413 | 88 |
| Logan | 18.9% | 796 | 4,219 | 151 | 849 | 1,372 | 1,051 | 279 | 444 | 73 |
| Johnson | 18.8% | 426 | 2,267 | 52 | 854 | 499 | 436 | 210 | 174 | 42 |
| Montgomery | 18.4% | 753 | 4,098 | 95 | 866 | 1,374 | 1,010 | 358 | 351 | 44 |
| Christian | 18.2% | 781 | 4,292 | 82 | 430 | 1,809 | 1,190 | 310 | 386 | 85 |
| Cass | 18.1% | 324 | 1,788 | 129 | 159 | 729 | 447 | 75 | 219 | 30 |
| Gallatin | 17.6% | 131 | 744 | 10 | 77 | 254 | 272 | 56 | 47 | 28 |
| Schuyler | 16.2% | 126 | 779 | 2 | 41 | 421 | 189 | 68 | 40 | 18 |
| Pike | 15.9% | 321 | 2,016 | 43 | 228 | 836 | 588 | 133 | 152 | 36 |
| Pulaski | 14.7% | 105 | 714 | 12 | 99 | 323 | 175 | 65 | 38 | 2 |
| Fayette | 14.5% | 413 | 2,857 | 72 | 742 | 1,052 | 578 | 229 | 150 | 34 |
| Alexander | 12.2% | 142 | 1,162 | 27 | 319 | 436 | 238 | 87 | 47 | 8 |
| Brown | 11.3% | 148 | 1,313 | 76 | 598 | 220 | 271 | 84 | 61 | 3 |