Iowa 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 Iowa was 2,321,085 and represented 73.93% of the total Iowa population.
Among all Iowa counties, Polk had the highest citizen voting-age population (337.88K), followed by Linn (166.05K), and Scott (127.87K).
In terms of percentages, Winneshiek had the highest percentage of its population being citizens of voting-age (80.26%), followed by Dickinson (80.12%), and Monona (79.50%).
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 | 337875 | 70.45 |
| Linn | 166050 | 74.18 |
| Scott | 127865 | 74.15 |
| Johnson | 107830 | 72.58 |
| Black Hawk | 99360 | 75.05 |
| Story | 74285 | 76.63 |
| Dubuque | 73435 | 75.72 |
| Woodbury | 72105 | 70.29 |
| Pottawattamie | 69390 | 74.30 |
| Dallas | 59795 | 68.65 |
| Warren | 37380 | 74.65 |
| Clinton | 35920 | 76.57 |
| Cerro Gordo | 33625 | 78.50 |
| Muscatine | 30805 | 71.82 |
| Des Moines | 30075 | 76.36 |
| Jasper | 28455 | 76.97 |
| Webster | 28185 | 77.12 |
| Lee | 26655 | 77.88 |
| Marshall | 26525 | 66.37 |
| Wapello | 25605 | 72.87 |
| Marion | 25200 | 75.97 |
| Sioux | 23950 | 68.77 |
| Boone | 20480 | 77.66 |
| Benton | 19485 | 76.01 |
| Bremer | 19165 | 77.08 |
| Plymouth | 18370 | 73.28 |
| Mahaska | 16705 | 75.37 |
| Winneshiek | 16260 | 80.26 |
| Washington | 16220 | 73.39 |
| Jones | 16030 | 77.97 |
| Fayette | 15540 | 78.47 |
| Buchanan | 15400 | 72.92 |
| Henry | 15235 | 76.40 |
| Carroll | 15170 | 74.80 |
| Jackson | 14960 | 77.11 |
| Poweshiek | 14435 | 78.49 |
| Cedar | 14090 | 76.35 |
| Jefferson | 13950 | 76.86 |
| Dickinson | 13720 | 80.12 |
| Clayton | 13640 | 77.39 |
| Hardin | 13230 | 77.55 |
| Delaware | 13000 | 75.65 |
| Tama | 12555 | 73.72 |
| Iowa | 12390 | 76.53 |
| Buena Vista | 12295 | 61.29 |
| Clay | 12295 | 75.85 |
| Floyd | 12105 | 76.69 |
| Page | 12030 | 78.78 |
| Madison | 11920 | 74.45 |
| Kossuth | 11565 | 77.20 |
| Mills | 11335 | 75.39 |
| Hamilton | 11255 | 75.06 |
| Butler | 11215 | 76.66 |
| Harrison | 10810 | 76.72 |
| Crawford | 10705 | 62.84 |
| O'Brien | 10415 | 75.28 |
| Allamakee | 10275 | 74.38 |
| Cass | 10055 | 76.81 |
| Appanoose | 9655 | 77.55 |
| Grundy | 9445 | 76.79 |
| Union | 9445 | 76.42 |
| Wright | 9265 | 72.72 |
| Chickasaw | 9120 | 75.84 |
| Shelby | 8905 | 76.73 |
| Cherokee | 8885 | 78.32 |
| Lyon | 8310 | 70.57 |
| Hancock | 8290 | 76.76 |
| Winnebago | 8165 | 77.50 |
| Guthrie | 8110 | 76.01 |
| Mitchell | 8060 | 75.97 |
| Louisa | 8005 | 71.60 |
| Keokuk | 7800 | 76.55 |
| Calhoun | 7635 | 78.35 |
| Montgomery | 7630 | 75.88 |
| Sac | 7520 | 76.74 |
| Franklin | 7500 | 73.82 |
| Emmet | 7225 | 76.54 |
| Humboldt | 7155 | 74.88 |
| Monona | 6940 | 79.50 |
| Greene | 6850 | 76.54 |
| Howard | 6845 | 74.20 |
| Clarke | 6720 | 71.80 |
| Palo Alto | 6715 | 74.57 |
| Lucas | 6455 | 75.19 |
| Davis | 6280 | 70.40 |
| Decatur | 6110 | 76.57 |
| Monroe | 5960 | 76.36 |
| Worth | 5865 | 78.78 |
| Adair | 5480 | 77.35 |
| Van Buren | 5465 | 76.43 |
| Fremont | 5385 | 77.54 |
| Ida | 5240 | 75.94 |
| Pocahontas | 5175 | 76.16 |
| Wayne | 4775 | 74.26 |
| Taylor | 4570 | 74.13 |
| Osceola | 4435 | 73.31 |
| Audubon | 4415 | 79.26 |
| Ringgold | 3720 | 74.92 |
| Adams | 2895 | 78.88 |
