Illinois Citizen Voting-age Population By County in 2024 (ACS-5Yrs)
Based on the US Census Bureau's special tabulation from the ACS 5-year estimates, in 2024, the citizen voting-age population for Illinois was 9,094,987 and represented 71.64% of the total Illinois population.
Among all Illinois counties, Cook had the highest citizen voting-age population (3.59M), followed by DuPage (651.65K), and Will (497.63K).
In terms of percentages, Hardin had the highest percentage of its population being citizens of voting-age (85.16%), followed by Pope (85.08%), and Schuyler (82.88%).
The chart and table below shows the citizen voting-age population of each county and the percentage of each county's population that were citizens of voting-age.
You can see similar information for other states and by state for the United States.
| County | Citizen Voting-age Population | % of County Population |
|---|---|---|
| Cook | 3590885 | 69.29 |
| DuPage | 651651 | 70.07 |
| Will | 497634 | 70.94 |
| Lake | 484882 | 67.89 |
| Kane | 349478 | 67.56 |
| McHenry | 227708 | 72.85 |
| Madison | 205631 | 77.82 |
| Winnebago | 205347 | 72.49 |
| St. Clair | 191810 | 75.61 |
| Champaign | 150737 | 72.21 |
| Sangamon | 149253 | 76.56 |
| Peoria | 131077 | 72.96 |
| McLean | 128316 | 74.80 |
| Rock Island | 104875 | 73.47 |
| Tazewell | 100864 | 77.42 |
| Kendall | 93541 | 67.94 |
| LaSalle | 83702 | 76.99 |
| Kankakee | 79689 | 74.73 |
| Macon | 77500 | 76.09 |
| DeKalb | 75692 | 75.16 |
| Vermilion | 55108 | 76.14 |
| Williamson | 52032 | 77.81 |
| Adams | 49877 | 77.02 |
| Whiteside | 42143 | 76.70 |
| Jackson | 41166 | 77.58 |
| Grundy | 39697 | 74.59 |
| Ogle | 38925 | 75.59 |
| Knox | 38111 | 77.71 |
| Henry | 37817 | 77.75 |
| Boone | 37733 | 70.88 |
| Coles | 37638 | 80.46 |
| Macoupin | 35062 | 79.06 |
| Stephenson | 33948 | 77.57 |
| Woodford | 28849 | 75.30 |
| Franklin | 28842 | 77.28 |
| Clinton | 28565 | 77.30 |
| Jefferson | 28127 | 76.96 |
| Marion | 28046 | 75.80 |
| Livingston | 27396 | 77.03 |
| Monroe | 27239 | 77.74 |
| Christian | 26891 | 80.18 |
| Lee | 26757 | 79.00 |
| Morgan | 26641 | 80.67 |
| Fulton | 26338 | 79.76 |
| Effingham | 25950 | 75.17 |
| Bureau | 25652 | 78.05 |
| Randolph | 23513 | 78.23 |
| Montgomery | 22253 | 79.63 |
| Logan | 22171 | 80.00 |
| McDonough | 21612 | 80.28 |
| Iroquois | 20232 | 76.49 |
| Saline | 18302 | 78.84 |
| Jo Daviess | 17720 | 81.11 |
| Jersey | 16924 | 79.55 |
| Fayette | 16874 | 79.15 |
| Perry | 16531 | 80.10 |
| Shelby | 16235 | 78.35 |
| Crawford | 14708 | 79.46 |
| Douglas | 14493 | 73.38 |
| Bond | 13653 | 81.67 |
| Hancock | 13489 | 78.05 |
| Union | 13199 | 77.66 |
| Edgar | 13196 | 79.80 |
| Piatt | 12992 | 77.82 |
| Carroll | 12585 | 80.79 |
| Mercer | 12217 | 78.85 |
| Wayne | 12122 | 75.90 |
| Warren | 12104 | 73.61 |
| Lawrence | 12100 | 80.50 |
| De Witt | 11998 | 78.05 |
| Richland | 11898 | 76.28 |
| Clark | 11748 | 76.95 |
| Pike | 11025 | 76.19 |
| Johnson | 10801 | 80.76 |
| Massac | 10787 | 77.79 |
| Washington | 10748 | 78.88 |
| Moultrie | 10742 | 74.49 |
| White | 10620 | 77.99 |
| Ford | 10093 | 75.29 |
| Mason | 10076 | 79.05 |
| Clay | 9925 | 76.04 |
| Menard | 9411 | 77.82 |
| Marshall | 9195 | 78.94 |
| Greene | 9102 | 77.90 |
| Wabash | 8690 | 78.18 |
| Cass | 8464 | 66.21 |
| Cumberland | 8009 | 77.49 |
| Jasper | 7035 | 76.65 |
| Hamilton | 6171 | 77.96 |
| Schuyler | 5624 | 82.88 |
| Brown | 5203 | 82.33 |
| Henderson | 5035 | 81.29 |
| Edwards | 4714 | 77.57 |
| Putnam | 4487 | 80.13 |
| Stark | 4100 | 77.23 |
| Pulaski | 3975 | 79.29 |
| Scott | 3884 | 78.66 |
| Gallatin | 3825 | 79.44 |
| Alexander | 3819 | 78.31 |
| Calhoun | 3465 | 79.99 |
| Pope | 3183 | 85.08 |
| Hardin | 3069 | 85.16 |
