Illinois Citizen Voting-age Population By County in 2011 (ACS-5Yrs)
Based on the US Census Bureau's special tabulation from the ACS 5-year estimates, in 2011, the citizen voting-age population for Illinois was 8,772,705 and represented 68.59% of the total Illinois population.
Among all Illinois counties, Cook had the highest citizen voting-age population (3.40M), followed by DuPage (615.06K), and Lake (443.87K).
In terms of percentages, McDonough had the highest percentage of its population being citizens of voting-age (82.68%), followed by Pope (82.01%), and Brown (81.80%).
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 | 3394605 | 65.50 |
| DuPage | 615060 | 67.28 |
| Lake | 443865 | 63.37 |
| Will | 441375 | 65.47 |
| Kane | 305770 | 60.00 |
| Winnebago | 209465 | 71.03 |
| McHenry | 208435 | 67.74 |
| Madison | 204295 | 76.10 |
| St. Clair | 196630 | 73.35 |
| Sangamon | 146850 | 74.77 |
| Champaign | 145910 | 73.16 |
| Peoria | 136575 | 73.51 |
| McLean | 124375 | 73.93 |
| Rock Island | 108420 | 73.44 |
| Tazewell | 102300 | 75.98 |
| LaSalle | 85420 | 75.02 |
| Macon | 84450 | 76.28 |
| Kankakee | 81320 | 72.03 |
| DeKalb | 76920 | 73.48 |
| Kendall | 72055 | 65.05 |
| Vermilion | 61015 | 74.59 |
| Adams | 51175 | 76.33 |
| Williamson | 50735 | 76.84 |
| Jackson | 47410 | 79.15 |
| Whiteside | 43920 | 74.92 |
| Coles | 43310 | 80.67 |
| Knox | 41250 | 78.01 |
| Ogle | 38700 | 72.30 |
| Henry | 37805 | 74.91 |
| Macoupin | 36740 | 76.73 |
| Stephenson | 36380 | 76.22 |
| Boone | 35135 | 64.96 |
| Grundy | 35070 | 70.91 |
| Franklin | 30280 | 76.58 |
| Jefferson | 30220 | 77.43 |
| Livingston | 30075 | 77.14 |
| Marion | 30035 | 75.88 |
| Clinton | 28780 | 76.59 |
| Fulton | 28680 | 77.26 |
| Woodford | 28205 | 73.21 |
| Morgan | 27825 | 78.00 |
| Lee | 27775 | 77.13 |
| McDonough | 27015 | 82.68 |
| Christian | 26880 | 77.03 |
| Randolph | 26405 | 78.81 |
| Bureau | 26105 | 74.66 |
| Effingham | 25550 | 74.64 |
| Monroe | 24570 | 74.99 |
| Logan | 23985 | 79.02 |
| Montgomery | 23510 | 78.04 |
| Iroquois | 22305 | 74.60 |
| Saline | 19200 | 76.59 |
| Jo Daviess | 17670 | 77.81 |
| Perry | 17630 | 78.69 |
| Jersey | 17590 | 76.58 |
| Shelby | 17205 | 77.05 |
| Fayette | 16950 | 76.87 |
| Crawford | 15600 | 78.59 |
| Hancock | 14885 | 77.71 |
| Edgar | 14420 | 77.28 |
| Douglas | 14265 | 71.47 |
| Bond | 13800 | 77.31 |
| Union | 13670 | 76.43 |
| Warren | 13335 | 75.17 |
| Lawrence | 13300 | 78.91 |
| Wayne | 12995 | 77.28 |
| De Witt | 12845 | 77.22 |
| Mercer | 12705 | 77.02 |
| Piatt | 12635 | 75.61 |
| Pike | 12590 | 76.14 |
| Clark | 12555 | 76.37 |
| Richland | 12405 | 76.67 |
| Carroll | 12170 | 78.64 |
| Massac | 11885 | 76.97 |
| White | 11585 | 78.57 |
| Washington | 11405 | 77.35 |
| Mason | 11400 | 77.08 |
| Moultrie | 10985 | 74.35 |
| Ford | 10715 | 76.05 |
| Greene | 10700 | 76.92 |
| Clay | 10545 | 76.08 |
| Johnson | 10035 | 79.23 |
| Marshall | 9800 | 77.23 |
| Menard | 9720 | 76.36 |
| Wabash | 9250 | 76.83 |
| Cass | 9085 | 66.61 |
| Cumberland | 8415 | 75.98 |
| Jasper | 7460 | 76.63 |
| Hamilton | 6485 | 76.84 |
| Alexander | 6330 | 76.13 |
| Henderson | 5820 | 78.86 |
| Schuyler | 5765 | 76.66 |
| Brown | 5640 | 81.80 |
| Edwards | 5115 | 76.40 |
| Pulaski | 4615 | 74.62 |
| Putnam | 4605 | 76.88 |
| Stark | 4510 | 75.42 |
| Gallatin | 4465 | 78.54 |
| Scott | 4040 | 75.51 |
| Calhoun | 3935 | 77.23 |
| Pope | 3625 | 82.01 |
| Hardin | 3425 | 78.65 |
