Iowa Citizen Voting-age Population By County in 2014 (ACS-5Yrs)
Based on the US Census Bureau's special tabulation from the ACS 5-year estimates, in 2014, the citizen voting-age population for Iowa was 2,273,765 and represented 73.87% of the total Iowa population.
Among all Iowa counties, Polk had the highest citizen voting-age population (312.82K), followed by Linn (159.85K), and Scott (125.28K).
In terms of percentages, Dickinson had the highest percentage of its population being citizens of voting-age (80.09%), followed by Calhoun (79.56%), and Adams (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 | 312820 | 70.28 |
| Linn | 159850 | 74.38 |
| Scott | 125280 | 74.26 |
| Johnson | 101430 | 74.15 |
| Black Hawk | 100440 | 76.12 |
| Dubuque | 72080 | 75.74 |
| Story | 70185 | 76.34 |
| Woodbury | 69735 | 68.12 |
| Pottawattamie | 69290 | 74.38 |
| Dallas | 48775 | 67.63 |
| Clinton | 36945 | 75.92 |
| Warren | 34900 | 74.16 |
| Cerro Gordo | 34145 | 78.13 |
| Des Moines | 30745 | 76.36 |
| Muscatine | 30495 | 71.16 |
| Webster | 28735 | 76.83 |
| Jasper | 28360 | 77.24 |
| Lee | 27550 | 77.50 |
| Marshall | 27215 | 66.51 |
| Wapello | 25810 | 72.90 |
| Marion | 24860 | 74.63 |
| Sioux | 23680 | 69.12 |
| Boone | 20150 | 76.54 |
| Benton | 19375 | 74.82 |
| Bremer | 18965 | 77.47 |
| Plymouth | 18240 | 73.25 |
| Mahaska | 16970 | 75.69 |
| Winneshiek | 16535 | 78.91 |
| Washington | 16185 | 73.89 |
| Fayette | 16020 | 77.41 |
| Jones | 15905 | 77.19 |
| Carroll | 15630 | 75.51 |
| Henry | 15385 | 76.18 |
| Buchanan | 15320 | 73.14 |
| Jackson | 15180 | 77.23 |
| Poweshiek | 14520 | 77.38 |
| Cedar | 13990 | 75.89 |
| Clayton | 13690 | 76.48 |
| Dickinson | 13515 | 80.09 |
| Hardin | 13220 | 75.96 |
| Delaware | 13200 | 75.08 |
| Buena Vista | 13175 | 64.39 |
| Tama | 12945 | 73.68 |
| Clay | 12630 | 76.29 |
| Iowa | 12405 | 76.03 |
| Page | 12250 | 77.85 |
| Floyd | 12225 | 75.67 |
| Jefferson | 11930 | 69.77 |
| Kossuth | 11855 | 77.26 |
| Hamilton | 11585 | 75.40 |
| Madison | 11405 | 72.97 |
| Butler | 11390 | 76.11 |
| Mills | 11215 | 75.04 |
| Harrison | 11145 | 76.34 |
| Crawford | 11130 | 64.48 |
| O'Brien | 10595 | 74.74 |
| Allamakee | 10545 | 74.52 |
| Cass | 10530 | 76.89 |
| Appanoose | 9895 | 77.58 |
| Union | 9515 | 75.79 |
| Wright | 9500 | 73.05 |
| Grundy | 9425 | 75.98 |
| Cherokee | 9395 | 78.42 |
| Chickasaw | 9275 | 75.22 |
| Shelby | 9140 | 75.94 |
| Hancock | 8485 | 75.93 |
| Lyon | 8335 | 71.36 |
| Guthrie | 8235 | 76.29 |
| Winnebago | 8165 | 76.70 |
| Mitchell | 8105 | 75.43 |
| Montgomery | 8055 | 76.35 |
| Calhoun | 7940 | 79.56 |
| Keokuk | 7940 | 76.64 |
| Louisa | 7910 | 69.97 |
| Franklin | 7870 | 74.46 |
| Sac | 7820 | 76.97 |
| Emmet | 7510 | 74.58 |
| Humboldt | 7300 | 75.03 |
| Howard | 7120 | 74.71 |
| Monona | 7100 | 77.60 |
| Palo Alto | 7085 | 76.47 |
| Greene | 7050 | 76.38 |
| Clarke | 6605 | 71.14 |
| Lucas | 6370 | 72.51 |
| Decatur | 6365 | 76.83 |
| Davis | 6180 | 70.51 |
| Monroe | 5970 | 74.44 |
| Worth | 5870 | 77.59 |
| Adair | 5860 | 77.67 |
| Van Buren | 5755 | 76.89 |
| Fremont | 5580 | 77.50 |
| Pocahontas | 5565 | 77.40 |
| Ida | 5410 | 76.36 |
| Wayne | 4865 | 76.19 |
| Audubon | 4675 | 78.77 |
| Taylor | 4665 | 74.94 |
| Osceola | 4645 | 73.97 |
| Ringgold | 3830 | 75.39 |
| Adams | 3120 | 79.29 |
