Iowa Citizen Voting-age Population By County in 2024 (ACS-5Yrs)
Based on the US Census Bureau's special tabulation from the ACS 5-year estimates, in 2024, the citizen voting-age population for Iowa was 2,381,746 and represented 74.19% of the total Iowa population.
Among all Iowa counties, Polk had the highest citizen voting-age population (357.11K), followed by Linn (173.15K), and Scott (130.87K).
In terms of percentages, Page had the highest percentage of its population being citizens of voting-age (80.19%), followed by Dickinson (80.06%), and Winneshiek (79.29%).
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 | 357110 | 70.97 |
| Linn | 173145 | 75.28 |
| Scott | 130872 | 74.95 |
| Johnson | 118936 | 75.93 |
| Black Hawk | 98439 | 75.12 |
| Story | 79012 | 78.65 |
| Dubuque | 74810 | 75.55 |
| Dallas | 74585 | 69.08 |
| Woodbury | 72820 | 68.54 |
| Pottawattamie | 70006 | 74.93 |
| Warren | 40752 | 74.91 |
| Clinton | 35398 | 76.51 |
| Cerro Gordo | 33166 | 77.79 |
| Muscatine | 30928 | 72.67 |
| Des Moines | 29399 | 76.39 |
| Jasper | 29011 | 76.43 |
| Webster | 28302 | 76.72 |
| Marshall | 26764 | 66.72 |
| Marion | 25668 | 76.30 |
| Lee | 25616 | 77.88 |
| Wapello | 24880 | 70.36 |
| Sioux | 24659 | 68.10 |
| Boone | 20973 | 78.65 |
| Benton | 19767 | 76.83 |
| Bremer | 19450 | 77.17 |
| Plymouth | 18848 | 73.20 |
| Washington | 16623 | 73.69 |
| Mahaska | 16594 | 75.35 |
| Jones | 16463 | 78.79 |
| Winneshiek | 15756 | 79.29 |
| Henry | 15610 | 78.02 |
| Carroll | 15428 | 74.92 |
| Buchanan | 15313 | 73.99 |
| Jackson | 14996 | 77.34 |
| Fayette | 14844 | 76.96 |
| Poweshiek | 14467 | 78.00 |
| Cedar | 14405 | 78.51 |
| Dickinson | 14405 | 80.06 |
| Delaware | 13423 | 76.44 |
| Clayton | 13173 | 77.42 |
| Hardin | 13126 | 78.89 |
| Madison | 12615 | 74.54 |
| Iowa | 12585 | 76.25 |
| Buena Vista | 12512 | 60.28 |
| Tama | 12410 | 73.57 |
| Clay | 12399 | 75.33 |
| Page | 12130 | 80.19 |
| Floyd | 11827 | 77.16 |
| Jefferson | 11401 | 72.58 |
| Mills | 11195 | 76.83 |
| Harrison | 11194 | 76.49 |
| Kossuth | 10984 | 75.67 |
| Crawford | 10963 | 67.35 |
| Butler | 10901 | 76.40 |
| Hamilton | 10713 | 71.98 |
| O'Brien | 10261 | 72.63 |
| Allamakee | 10107 | 71.74 |
| Cass | 9987 | 76.25 |
| Appanoose | 9452 | 77.57 |
| Grundy | 9325 | 75.30 |
| Union | 9117 | 76.03 |
| Shelby | 8958 | 76.06 |
| Cherokee | 8857 | 76.36 |
| Chickasaw | 8830 | 74.78 |
| Wright | 8746 | 68.38 |
| Lyon | 8606 | 70.79 |
| Guthrie | 8299 | 77.63 |
| Hancock | 8279 | 77.58 |
| Winnebago | 8099 | 76.55 |
| Mitchell | 7949 | 75.18 |
| Montgomery | 7861 | 76.98 |
| Louisa | 7712 | 72.22 |
| Keokuk | 7653 | 77.12 |
| Calhoun | 7612 | 77.63 |
| Sac | 7434 | 76.73 |
| Emmet | 7341 | 79.25 |
| Humboldt | 7050 | 73.51 |
| Franklin | 6955 | 69.87 |
| Clarke | 6943 | 71.84 |
| Howard | 6903 | 73.08 |
| Greene | 6737 | 77.56 |
| Palo Alto | 6734 | 76.00 |
| Monona | 6620 | 77.36 |
| Lucas | 6530 | 74.89 |
| Davis | 6350 | 69.35 |
| Decatur | 5928 | 76.39 |
| Worth | 5786 | 78.72 |
| Monroe | 5760 | 76.66 |
| Adair | 5732 | 76.83 |
| Van Buren | 5511 | 76.11 |
| Pocahontas | 5301 | 75.25 |
| Ida | 5125 | 74.15 |
| Fremont | 5056 | 77.64 |
| Wayne | 4801 | 73.50 |
| Osceola | 4504 | 73.86 |
| Taylor | 4425 | 75.38 |
| Audubon | 4337 | 77.46 |
| Ringgold | 3584 | 77.13 |
| Adams | 2808 | 77.53 |
