Where to vote: Illinois voter lookup (state election office).
Registered voters, 2010-2024
EAVS counts, every two years.
Survey estimate: reported registration, 1972-2024
Current Population Survey: adults who said they were registered.
By county, 2024
EAVS 2024 by county-equivalent; citizens 18+ from the Census Bureau's 2020-2024 estimate. Illinois reports to the EAVS by town; towns are summed to their county through the county code in the EAVS jurisdiction FIPS.
| County | Registered | Active | Inactive | Citizens 18+ | Active, % of citizens 18+ |
|---|---|---|---|---|---|
| Adams County | 49,421 | 44,627 | 4,794 | 49,877 | 89.5% |
| Alexander County | 4,898 | 3,806 | 1,090 | 3,819 | 99.7% |
| Bond County | 10,761 | 10,297 | 464 | 13,653 | 75.4% |
| Boone County | 48,465 | 34,153 | 14,312 | 37,733 | 90.5% |
| Brown County | 3,274 | 3,097 | 177 | 5,203 | 59.5% |
| Bureau County | 24,318 | 22,738 | 1,580 | 25,652 | 88.6% |
| Calhoun County | 3,383 | 3,284 | 99 | 3,465 | 94.8% |
| Carroll County | 11,356 | 10,405 | 951 | 12,585 | 82.7% |
| Cass County | 7,773 | 7,769 | 4 | 8,464 | 91.8% |
| Champaign County | 147,282 | 122,822 | 24,460 | 150,737 | 81.5% |
| Chicago city | 1,770,744 | 1,498,909 | 247,411 | ||
| Christian County | 10,767 | 26,891 | |||
| Clark County | 12,188 | 10,993 | 1,195 | 11,748 | 93.6% |
| Clay County | 9,530 | 9,398 | 132 | 9,925 | 94.7% |
| Clinton County | 26,944 | 25,960 | 984 | 28,565 | 90.9% |
| Coles County | 30,501 | 29,069 | 1,432 | 37,638 | 77.2% |
| Cook County | 1,800,799 | 1,665,034 | 135,765 | 3,590,885 | 46.4% |
| Crawford County | 13,019 | 12,616 | 403 | 14,708 | 85.8% |
| Cumberland County | 7,739 | 7,625 | 114 | 8,009 | 95.2% |
| De Witt County | 10,327 | 10,239 | 88 | 11,998 | 85.3% |
| DeKalb County | 72,601 | 65,805 | 6,750 | 75,692 | 86.9% |
| Douglas County | 12,037 | 11,617 | 420 | 14,493 | 80.2% |
| DuPage County | 703,326 | 631,995 | 71,331 | 651,651 | 97.0% |
| Edgar County | 12,387 | 11,835 | 543 | 13,196 | 89.7% |
| Edwards County | 4,375 | 4,238 | 137 | 4,714 | 89.9% |
| Effingham County | 25,493 | 24,465 | 1,028 | 25,950 | 94.3% |
| Fayette County | 14,814 | 13,592 | 137 | 16,874 | 80.5% |
| Ford County | 9,871 | 9,294 | 577 | 10,093 | 92.1% |
| Franklin County | 29,749 | 29,055 | 633 | 28,842 | 100.7%* |
| Fulton County | 24,741 | 24,741 | 0 | 26,338 | 93.9% |
| Gallatin County | 3,536 | 3,520 | 16 | 3,825 | 92.0% |
| Greene County | 9,296 | 9,286 | 10 | 9,102 | 102.0%* |
| Grundy County | 38,854 | 35,856 | 2,998 | 39,697 | 90.3% |
| Hamilton County | 5,797 | 5,692 | 3 | 6,171 | 92.2% |
| Hancock County | 12,804 | 11,921 | 883 | 13,489 | 88.4% |
| Hardin County | 3,022 | 2,997 | 25 | 3,069 | 97.7% |
| Henderson County | 4,564 | 4,441 | 123 | 5,035 | 88.2% |
| Henry County | 36,720 | 36,350 | 363 | 37,817 | 96.1% |
| Iroquois County | 19,017 | 18,217 | 800 | 20,232 | 90.0% |
| Jackson County | 36,442 | 32,515 | 3,927 | 41,166 | 79.0% |
| Jasper County | 6,841 | 6,812 | 29 | 7,035 | 96.8% |
| Jefferson County | 25,340 | 24,022 | 1,299 | 28,127 | 85.4% |
| Jersey County | 15,887 | 15,442 | 444 | 16,924 | 91.2% |
| Jo Daviess County | 16,644 | 16,262 | 382 | 17,720 | 91.8% |
| Johnson County | 8,218 | 7,797 | 421 | 10,801 | 72.2% |
| Kane County | 309,210 | 308,025 | 1,185 | 349,478 | 88.1% |
| Kankakee County | 73,476 | 68,517 | 4,959 | 79,689 | 86.0% |
| Kendall County | 98,843 | 91,622 | 7,220 | 93,541 | 97.9% |
| Knox County | 14,656 | 14,656 | 0 | 38,111 | 38.5% |
| La Salle County | 74,812 | 74,752 | 7,796 | 83,702 | 89.3% |
| Lake County | 545,033 | 464,526 | 68,356 | 484,882 | 95.8% |
| Lawrence County | 8,927 | 8,927 | 0 | 12,100 | 73.8% |
| Lee County | 22,308 | 21,415 | 889 | 26,757 | 80.0% |
| Livingston County | 21,847 | 20,758 | 1,089 | 27,396 | 75.8% |
| Logan County | 10,773 | 9,981 | 779 | 22,171 | 45.0% |
| Macon County | 75,295 | 67,218 | 8,077 | 77,500 | 86.7% |
| Macoupin County | 32,567 | 30,760 | 1,807 | 35,062 | 87.7% |
| Madison County | 194,917 | 184,284 | 10,633 | 205,631 | 89.6% |
| Marion County | 27,622 | 25,229 | 2,218 | 28,046 | 90.0% |
| Marshall County | 8,669 | 8,435 | 234 | 9,195 | 91.7% |
| Mason County | 9,535 | 9,102 | 433 | 10,076 | 90.3% |
| Massac County | 11,959 | 10,828 | 1,129 | 10,787 | 100.4%* |
| McDonough County | 18,690 | 16,618 | 2,072 | 21,612 | 76.9% |
| McHenry County | 239,261 | 210,472 | 28,459 | 227,708 | 92.4% |
| McLean County | 71,591 | 67,406 | 4,185 | 128,316 | 52.5% |
| Menard County | 9,085 | 8,968 | 117 | 9,411 | 95.3% |
| Mercer County | 13,021 | 12,926 | 86 | 12,217 | 105.8%* |
| Monroe County | 29,966 | 26,339 | 3,561 | 27,239 | 96.7% |
| Montgomery County | 17,509 | 16,956 | 553 | 22,253 | 76.2% |
| Morgan County | 45,757 | 22,336 | 23,379 | 26,641 | 83.8% |
| Moultrie County | 9,085 | 8,800 | 285 | 10,742 | 81.9% |
| Ogle County | 37,669 | 34,483 | 3,139 | 38,925 | 88.6% |
| Peoria County | 130,395 | 117,790 | 10,826 | 131,077 | 89.9% |
| Perry County | 15,151 | 15,151 | 0 | 16,531 | 91.7% |
| Piatt County | 12,675 | 12,142 | 533 | 12,992 | 93.5% |
| Pike County | 10,443 | 10,122 | 321 | 11,025 | 91.8% |
| Pope County | 2,823 | 2,823 | 0 | 3,183 | 88.7% |
| Pulaski County | 4,471 | 4,341 | 130 | 3,975 | 109.2%* |
| Putnam County | 4,173 | 4,081 | 92 | 4,487 | 91.0% |
| Randolph County | 20,743 | 20,290 | 453 | 23,513 | 86.3% |
| Richland County | 10,755 | 9,506 | 1,242 | 11,898 | 79.9% |
| Rock Island County | 90,276 | 86,205 | 4,071 | 104,875 | 82.2% |
| Rockford city | 105,934 | 93,970 | 11,964 | ||
| Saline County | 15,945 | 15,631 | 314 | 18,302 | 85.4% |
| Sangamon County | 154,040 | 139,246 | 14,794 | 149,253 | 93.3% |
| Schuyler County | 4,979 | 4,979 | 0 | 5,624 | 88.5% |
| Scott County | 3,492 | 3,469 | 23 | 3,884 | 89.3% |
| Shelby County | 15,428 | 14,893 | 535 | 16,235 | 91.7% |
| St. Clair County | 188,339 | 168,619 | 19,513 | 191,810 | 87.9% |
| Stark County | 3,635 | 3,623 | 12 | 4,100 | 88.4% |
| Stephenson County | 29,105 | 26,895 | 2,210 | 33,948 | 79.2% |
| Tazewell County | 91,753 | 91,651 | 99 | 100,864 | 90.9% |
| Union County | 13,563 | 12,335 | 1,185 | 13,199 | 93.5% |
| Vermilion County | 29,529 | 27,333 | 2,196 | 55,108 | 49.6% |
| Wabash County 2 towns | 27,246 | 23,503 | 3,743 | 8,690 | 270.5%* |
| Warren County | 11,011 | 9,951 | 1,060 | 12,104 | 82.2% |
| Washington County | 10,299 | 9,896 | 403 | 10,748 | 92.1% |
| Wayne County | 11,285 | 11,106 | 179 | 12,122 | 91.6% |
| White County | 10,121 | 9,702 | 419 | 10,620 | 91.4% |
| Whiteside County | 38,035 | 36,572 | 1,463 | 42,143 | 86.8% |
| Will County | 438,888 | 428,909 | 9,979 | 497,634 | 86.2% |
| Williamson County | 53,816 | 48,182 | 385 | 52,032 | 92.6% |
| Winnebago County | 102,461 | 94,896 | 7,565 | 205,347 | 46.2% |
| Woodford County | 30,574 | 27,442 | 3,132 | 28,849 | 95.1% |
* Active registered voters exceed the Census estimate of citizens 18+: list maintenance or CVAP margin.
About these figures
Counts are what state election offices report to the US Election Assistance Commission (EAVS) after each November election; questions and state practice change between years. The share is active voters over the Census Bureau's citizen voting-age population estimate (CVAP). The survey line is self-reported (Current Population Survey) and kept separate from the office counts.
Illinois does not register voters by party.
The AVR mark is the year automatic voter registration began in Illinois, from the Brennan Center's list.
Registration counts: US Election Assistance Commission, Election Administration and Voting Survey 2008-2024 (public domain).
Citizen voting-age population: US Census Bureau, CVAP special tabulation, 2020-2024 ACS (public domain). Survey estimate: US Census Bureau, Current Population Survey voting and registration tables A-5b and A-3b (public domain).
PollCheck US. Data through November 5, 2026. Photo credits