Illinois Citizen Voting-age Population By County in 2023 (ACS-5Yrs)
Based on the US Census Bureau's special tabulation from the ACS 5-year estimates, in 2023, the citizen voting-age population for Illinois was 9,080,000 and represented 71.54% of the total Illinois population.
Among all Illinois counties, Cook had the highest citizen voting-age population (3.59M), followed by DuPage (649.84K), and Will (494.28K).
In terms of percentages, Hardin had the highest percentage of its population being citizens of voting-age (86.07%), followed by Pope (83.89%), and Brown (82.04%).
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 | 3585950 | 69.15 |
| DuPage | 649840 | 70.08 |
| Will | 494280 | 70.77 |
| Lake | 481670 | 67.66 |
| Kane | 347410 | 67.32 |
| McHenry | 227055 | 72.92 |
| Madison | 205655 | 77.71 |
| Winnebago | 204965 | 72.35 |
| St. Clair | 192290 | 75.47 |
| Champaign | 149620 | 72.60 |
| Sangamon | 149530 | 76.60 |
| Peoria | 131185 | 72.95 |
| McLean | 128125 | 74.98 |
| Rock Island | 105165 | 73.55 |
| Tazewell | 100625 | 77.08 |
| Kendall | 91615 | 67.83 |
| LaSalle | 83850 | 76.89 |
| Kankakee | 79635 | 74.54 |
| Macon | 78060 | 76.09 |
| DeKalb | 75550 | 75.17 |
| Vermilion | 55560 | 75.92 |
| Williamson | 51725 | 77.32 |
| Adams | 50085 | 76.86 |
| Whiteside | 42320 | 76.68 |
| Jackson | 40870 | 77.55 |
| Grundy | 39205 | 74.08 |
| Ogle | 38685 | 75.07 |
| Knox | 38280 | 77.66 |
| Henry | 37845 | 77.31 |
| Boone | 37810 | 70.92 |
| Coles | 37585 | 80.50 |
| Macoupin | 35170 | 78.92 |
| Stephenson | 34210 | 77.68 |
| Franklin | 29005 | 77.26 |
| Woodford | 28865 | 75.27 |
| Clinton | 28490 | 77.21 |
| Jefferson | 28315 | 76.92 |
| Marion | 28230 | 75.69 |
| Livingston | 27550 | 77.26 |
| Monroe | 27185 | 77.74 |
| Lee | 26825 | 78.76 |
| Christian | 26810 | 79.59 |
| Fulton | 26475 | 79.60 |
| Morgan | 26205 | 80.33 |
| Effingham | 25790 | 74.74 |
| Bureau | 25630 | 77.61 |
| Randolph | 23600 | 78.30 |
| Montgomery | 22315 | 79.47 |
| Logan | 22235 | 79.78 |
| McDonough | 21920 | 80.89 |
| Iroquois | 20425 | 76.37 |
| Saline | 18340 | 78.43 |
| Jo Daviess | 17765 | 81.05 |
| Jersey | 16910 | 79.26 |
| Fayette | 16895 | 79.02 |
| Perry | 16600 | 79.77 |
| Shelby | 16325 | 78.24 |
| Crawford | 14760 | 79.40 |
| Douglas | 14490 | 73.61 |
| Hancock | 13600 | 78.00 |
| Bond | 13440 | 80.84 |
| Edgar | 13305 | 79.98 |
| Union | 13180 | 77.67 |
| Piatt | 13000 | 77.84 |
| Carroll | 12730 | 81.50 |
| Warren | 12490 | 75.35 |
| Mercer | 12285 | 78.65 |
| Wayne | 12190 | 76.21 |
| Lawrence | 12140 | 80.21 |
| De Witt | 12025 | 77.78 |
| Richland | 11985 | 76.46 |
| Clark | 11800 | 76.97 |
| Pike | 11160 | 76.31 |
| Johnson | 10915 | 81.76 |
| Massac | 10860 | 77.79 |
| Washington | 10765 | 78.69 |
| Moultrie | 10740 | 74.22 |
| White | 10675 | 77.86 |
| Mason | 10215 | 79.31 |
| Clay | 10120 | 76.81 |
| Ford | 10120 | 75.55 |
| Menard | 9425 | 77.44 |
| Greene | 9300 | 78.58 |
| Marshall | 9140 | 78.02 |
| Wabash | 8665 | 77.37 |
| Cass | 8555 | 66.71 |
| Cumberland | 7885 | 75.96 |
| Jasper | 7125 | 77.15 |
| Hamilton | 6145 | 77.10 |
| Schuyler | 5595 | 81.98 |
| Brown | 5185 | 82.04 |
| Henderson | 5080 | 80.83 |
| Edwards | 4725 | 77.21 |
| Putnam | 4480 | 80.00 |
| Stark | 4125 | 77.47 |
| Pulaski | 4030 | 79.41 |
| Alexander | 3950 | 78.37 |
| Gallatin | 3885 | 80.02 |
| Scott | 3795 | 78.33 |
| Calhoun | 3505 | 79.57 |
| Pope | 3150 | 83.89 |
| Hardin | 3120 | 86.07 |
