Illinois Citizen Voting-age Population By County in 2019 (ACS-5Yrs)
Based on the US Census Bureau's special tabulation from the ACS 5-year estimates, in 2019, the citizen voting-age population for Illinois was 9,049,960 and represented 70.86% of the total Illinois population.
Among all Illinois counties, Cook had the highest citizen voting-age population (3.54M), followed by DuPage (650.01K), and Will (479.66K).
In terms of percentages, Pope had the highest percentage of its population being citizens of voting-age (84.54%), followed by Hardin (82.74%), and Brown (81.37%).
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 | 3541180 | 68.12 |
| DuPage | 650010 | 69.96 |
| Will | 479655 | 69.58 |
| Lake | 469635 | 66.95 |
| Kane | 345240 | 64.97 |
| McHenry | 222200 | 72.21 |
| Winnebago | 206665 | 72.56 |
| Madison | 204035 | 77.06 |
| St. Clair | 196570 | 74.93 |
| Champaign | 154160 | 73.44 |
| Sangamon | 149785 | 76.09 |
| Peoria | 134420 | 73.55 |
| McLean | 128880 | 74.68 |
| Rock Island | 105715 | 73.48 |
| Tazewell | 101635 | 76.31 |
| Kendall | 84610 | 67.12 |
| LaSalle | 84075 | 76.62 |
| Kankakee | 82330 | 74.42 |
| Macon | 81120 | 76.87 |
| DeKalb | 77805 | 74.55 |
| Vermilion | 58210 | 75.05 |
| Williamson | 51880 | 77.32 |
| Adams | 50930 | 77.07 |
| Jackson | 45300 | 78.14 |
| Whiteside | 42565 | 75.99 |
| Coles | 41430 | 80.67 |
| Knox | 39430 | 78.06 |
| Ogle | 38140 | 74.75 |
| Henry | 37700 | 76.53 |
| Grundy | 36995 | 73.02 |
| Boone | 36685 | 68.53 |
| Macoupin | 35645 | 78.40 |
| Stephenson | 34950 | 77.50 |
| Franklin | 30185 | 77.55 |
| Clinton | 29315 | 77.89 |
| Jefferson | 29255 | 77.02 |
| Woodford | 29210 | 75.48 |
| Marion | 28880 | 76.51 |
| Fulton | 27825 | 79.30 |
| Livingston | 27825 | 77.21 |
| Morgan | 27435 | 80.11 |
| Lee | 27165 | 78.99 |
| Monroe | 26330 | 77.06 |
| Christian | 25960 | 78.83 |
| Randolph | 25780 | 79.83 |
| Effingham | 25700 | 75.29 |
| Bureau | 25340 | 76.51 |
| McDonough | 24665 | 80.92 |
| Logan | 23160 | 79.85 |
| Montgomery | 22935 | 79.55 |
| Iroquois | 21225 | 76.32 |
| Saline | 18730 | 78.06 |
| Jersey | 17240 | 78.60 |
| Jo Daviess | 17210 | 79.71 |
| Perry | 17085 | 80.40 |
| Shelby | 17040 | 78.40 |
| Fayette | 17025 | 78.95 |
| Crawford | 15060 | 79.39 |
| Douglas | 14340 | 73.07 |
| Hancock | 14120 | 78.51 |
| Edgar | 13850 | 79.58 |
| Bond | 13220 | 79.69 |
| Union | 13155 | 77.52 |
| Lawrence | 12920 | 80.57 |
| Warren | 12750 | 74.37 |
| Wayne | 12615 | 76.92 |
| Piatt | 12590 | 76.77 |
| De Witt | 12330 | 77.40 |
| Mercer | 12200 | 78.26 |
| Pike | 12075 | 77.06 |
| Richland | 12005 | 76.15 |
| Clark | 11955 | 76.07 |
| Carroll | 11565 | 79.95 |
| Washington | 10985 | 78.13 |
| Massac | 10925 | 76.83 |
| Moultrie | 10875 | 74.28 |
| Mason | 10790 | 79.22 |
| White | 10740 | 77.43 |
| Greene | 10360 | 78.90 |
| Clay | 10255 | 77.19 |
| Ford | 10205 | 76.90 |
| Johnson | 10085 | 80.71 |
| Menard | 9585 | 77.90 |
| Marshall | 9220 | 78.94 |
| Wabash | 8815 | 76.35 |
| Cass | 8565 | 68.55 |
| Cumberland | 8295 | 76.56 |
| Jasper | 7315 | 76.24 |
| Hamilton | 6350 | 77.68 |
| Henderson | 5520 | 81.06 |
| Schuyler | 5445 | 78.29 |
| Brown | 5395 | 81.37 |
| Edwards | 4950 | 76.69 |
| Alexander | 4800 | 76.68 |
| Putnam | 4570 | 79.90 |
| Pulaski | 4275 | 77.59 |
| Stark | 4240 | 77.87 |
| Gallatin | 4020 | 79.37 |
| Scott | 3885 | 77.62 |
| Calhoun | 3810 | 78.88 |
| Pope | 3555 | 84.54 |
| Hardin | 3260 | 82.74 |
