Iowa 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 Iowa was 2,370,445 and represented 74.17% of the total Iowa population.
Among all Iowa counties, Polk had the highest citizen voting-age population (352.17K), followed by Linn (172.52K), and Scott (130.47K).
In terms of percentages, Page had the highest percentage of its population being citizens of voting-age (80.36%), followed by Winneshiek (79.44%), and Dickinson (79.32%).
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 |
|---|---|---|
| Polk | 352170 | 70.80 |
| Linn | 172520 | 75.18 |
| Scott | 130470 | 74.85 |
| Johnson | 116150 | 74.99 |
| Black Hawk | 98410 | 75.30 |
| Story | 77525 | 78.63 |
| Dubuque | 74650 | 75.44 |
| Woodbury | 72775 | 68.81 |
| Dallas | 71995 | 69.14 |
| Pottawattamie | 69945 | 74.88 |
| Warren | 40010 | 74.81 |
| Clinton | 35505 | 76.54 |
| Cerro Gordo | 33350 | 77.95 |
| Muscatine | 30785 | 72.04 |
| Des Moines | 29575 | 76.63 |
| Jasper | 29030 | 76.67 |
| Webster | 28165 | 76.43 |
| Marshall | 26970 | 67.48 |
| Lee | 26050 | 78.52 |
| Marion | 25460 | 75.89 |
| Wapello | 25155 | 71.33 |
| Sioux | 24685 | 68.60 |
| Boone | 21040 | 78.89 |
| Benton | 19695 | 76.63 |
| Bremer | 19350 | 77.03 |
| Plymouth | 18775 | 73.05 |
| Mahaska | 16575 | 75.19 |
| Washington | 16525 | 73.31 |
| Jones | 16355 | 78.63 |
| Winneshiek | 15865 | 79.44 |
| Henry | 15670 | 77.46 |
| Carroll | 15540 | 75.16 |
| Buchanan | 15165 | 73.46 |
| Jackson | 15075 | 77.59 |
| Fayette | 15000 | 77.34 |
| Poweshiek | 14550 | 78.31 |
| Cedar | 14305 | 77.64 |
| Dickinson | 14155 | 79.32 |
| Delaware | 13415 | 76.44 |
| Hardin | 13215 | 78.99 |
| Clayton | 13205 | 77.36 |
| Iowa | 12575 | 76.01 |
| Clay | 12540 | 76.25 |
| Buena Vista | 12525 | 60.55 |
| Madison | 12525 | 74.73 |
| Tama | 12415 | 73.11 |
| Page | 12190 | 80.36 |
| Floyd | 11950 | 77.10 |
| Jefferson | 11685 | 74.55 |
| Crawford | 11220 | 68.88 |
| Harrison | 11220 | 76.61 |
| Mills | 11115 | 76.31 |
| Kossuth | 11085 | 75.87 |
| Butler | 10935 | 76.47 |
| Hamilton | 10755 | 72.21 |
| O'Brien | 10300 | 73.02 |
| Allamakee | 10220 | 72.79 |
| Cass | 10005 | 76.29 |
| Appanoose | 9525 | 77.82 |
| Grundy | 9355 | 75.75 |
| Union | 9110 | 75.66 |
| Shelby | 8980 | 76.39 |
| Chickasaw | 8920 | 75.15 |
| Cherokee | 8905 | 76.87 |
| Wright | 8825 | 68.86 |
| Lyon | 8525 | 70.54 |
| Hancock | 8290 | 77.33 |
| Guthrie | 8240 | 77.41 |
| Winnebago | 8205 | 77.04 |
| Mitchell | 7915 | 75.02 |
| Montgomery | 7865 | 76.69 |
| Louisa | 7800 | 72.83 |
| Calhoun | 7665 | 77.74 |
| Keokuk | 7645 | 76.72 |
| Sac | 7405 | 75.87 |
| Emmet | 7295 | 78.32 |
| Humboldt | 7070 | 73.84 |
| Franklin | 7050 | 70.68 |
| Clarke | 7025 | 72.50 |
| Howard | 6955 | 73.52 |
| Greene | 6805 | 78.04 |
| Palo Alto | 6730 | 75.62 |
| Monona | 6680 | 77.49 |
| Lucas | 6600 | 75.99 |
| Davis | 6340 | 69.48 |
| Worth | 5825 | 78.93 |
| Decatur | 5820 | 75.88 |
| Monroe | 5800 | 76.87 |
| Adair | 5740 | 76.84 |
| Van Buren | 5520 | 76.30 |
| Pocahontas | 5295 | 75.21 |
| Ida | 5180 | 74.59 |
| Fremont | 5070 | 77.17 |
| Wayne | 4760 | 73.01 |
| Osceola | 4495 | 73.51 |
| Taylor | 4375 | 74.15 |
| Audubon | 4345 | 77.31 |
| Ringgold | 3565 | 76.42 |
| Adams | 2840 | 78.02 |
