Illinois Citizen Voting-age Population By County in 2010 (ACS-5Yrs)
Based on the US Census Bureau's special tabulation from the ACS 5-year estimates, in 2010, the citizen voting-age population for Illinois was 8,717,365 and represented 68.40% of the total Illinois population.
Among all Illinois counties, Cook had the highest citizen voting-age population (3.38M), followed by DuPage (609.91K), and Lake (439.36K).
In terms of percentages, McDonough had the highest percentage of its population being citizens of voting-age (82.62%), followed by Brown (81.29%), and Coles (80.78%).
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 | 3376835 | 65.28 |
| DuPage | 609905 | 66.91 |
| Lake | 439360 | 63.02 |
| Will | 435080 | 65.13 |
| Kane | 300715 | 59.83 |
| Winnebago | 208600 | 70.96 |
| McHenry | 205970 | 67.30 |
| Madison | 203555 | 75.95 |
| St. Clair | 195325 | 73.23 |
| Sangamon | 146085 | 74.80 |
| Champaign | 145190 | 73.38 |
| Peoria | 136235 | 73.60 |
| McLean | 123410 | 74.03 |
| Rock Island | 108780 | 73.74 |
| Tazewell | 101380 | 75.73 |
| LaSalle | 84915 | 74.62 |
| Macon | 84145 | 76.00 |
| Kankakee | 80435 | 71.75 |
| DeKalb | 76735 | 73.77 |
| Kendall | 68325 | 64.70 |
| Vermilion | 60860 | 74.19 |
| Adams | 51115 | 76.26 |
| Williamson | 50355 | 76.78 |
| Jackson | 47440 | 79.25 |
| Whiteside | 43880 | 74.69 |
| Coles | 43275 | 80.78 |
| Knox | 41260 | 77.95 |
| Ogle | 38420 | 71.71 |
| Henry | 37760 | 74.81 |
| Macoupin | 36840 | 76.78 |
| Stephenson | 36355 | 76.07 |
| Boone | 34610 | 64.61 |
| Grundy | 34510 | 70.80 |
| Franklin | 30335 | 76.74 |
| Jefferson | 30180 | 76.99 |
| Marion | 30025 | 75.59 |
| Livingston | 29875 | 76.58 |
| Fulton | 28700 | 77.14 |
| Clinton | 28660 | 76.64 |
| Woodford | 27960 | 73.15 |
| Morgan | 27870 | 77.95 |
| Lee | 27695 | 76.72 |
| McDonough | 27040 | 82.62 |
| Christian | 26715 | 76.47 |
| Randolph | 26405 | 78.67 |
| Bureau | 26220 | 74.73 |
| Effingham | 25295 | 73.90 |
| Monroe | 24240 | 74.75 |
| Logan | 24100 | 79.17 |
| Montgomery | 23675 | 78.32 |
| Iroquois | 22465 | 74.71 |
| Saline | 19280 | 76.60 |
| Perry | 17735 | 78.86 |
| Jo Daviess | 17595 | 77.41 |
| Jersey | 17425 | 75.99 |
| Shelby | 17130 | 76.61 |
| Fayette | 16880 | 76.71 |
| Crawford | 15170 | 76.36 |
| Hancock | 14895 | 77.48 |
| Edgar | 14525 | 77.36 |
| Douglas | 14270 | 71.31 |
| Bond | 14050 | 78.47 |
| Union | 13795 | 76.81 |
| Warren | 13450 | 75.80 |
| Lawrence | 13360 | 79.29 |
| Wayne | 12975 | 77.03 |
| Pike | 12710 | 76.66 |
| Mercer | 12705 | 76.77 |
| De Witt | 12690 | 76.13 |
| Clark | 12590 | 76.10 |
| Piatt | 12590 | 75.34 |
| Richland | 12450 | 77.02 |
| Carroll | 12325 | 78.93 |
| Massac | 11865 | 76.92 |
| White | 11650 | 78.72 |
| Washington | 11480 | 77.36 |
| Mason | 11435 | 76.64 |
| Moultrie | 10990 | 74.64 |
| Greene | 10680 | 76.37 |
| Ford | 10610 | 75.17 |
| Clay | 10555 | 75.80 |
| Johnson | 10060 | 79.15 |
| Marshall | 9800 | 76.77 |
| Menard | 9685 | 76.26 |
| Wabash | 9360 | 77.10 |
| Cass | 9265 | 67.88 |
| Cumberland | 8400 | 75.85 |
| Jasper | 7470 | 76.61 |
| Hamilton | 6485 | 76.70 |
| Alexander | 6405 | 75.80 |
| Henderson | 5845 | 78.35 |
| Schuyler | 5710 | 75.88 |
| Brown | 5605 | 81.29 |
| Edwards | 5125 | 76.44 |
| Putnam | 4605 | 77.01 |
| Stark | 4555 | 74.86 |
| Pulaski | 4550 | 72.68 |
| Gallatin | 4505 | 78.01 |
| Scott | 4075 | 75.81 |
| Calhoun | 3945 | 77.05 |
| Pope | 3500 | 79.10 |
| Hardin | 3435 | 78.07 |
