Iowa Citizen Voting-age Population By County in 2011 (ACS-5Yrs)
Based on the US Census Bureau's special tabulation from the ACS 5-year estimates, in 2011, the citizen voting-age population for Iowa was 2,236,865 and represented 73.77% of the total Iowa population.
Among all Iowa counties, Polk had the highest citizen voting-age population (299.08K), followed by Linn (155.32K), and Scott (120.74K).
In terms of percentages, Dickinson had the highest percentage of its population being citizens of voting-age (80.76%), followed by Calhoun (79.14%), and Adams (78.58%).
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 | 299075 | 70.28 |
| Linn | 155325 | 73.96 |
| Scott | 120735 | 73.77 |
| Black Hawk | 99000 | 76.12 |
| Johnson | 97480 | 75.47 |
| Dubuque | 70210 | 75.31 |
| Woodbury | 69870 | 68.79 |
| Pottawattamie | 68565 | 74.15 |
| Story | 68200 | 77.00 |
| Dallas | 43615 | 67.74 |
| Clinton | 37185 | 75.60 |
| Cerro Gordo | 34185 | 77.33 |
| Warren | 33825 | 73.76 |
| Des Moines | 30665 | 76.18 |
| Muscatine | 29995 | 70.35 |
| Webster | 29065 | 76.28 |
| Jasper | 28375 | 76.90 |
| Lee | 27515 | 76.74 |
| Marshall | 27210 | 67.35 |
| Wapello | 26335 | 74.24 |
| Marion | 24730 | 74.11 |
| Sioux | 23165 | 69.06 |
| Boone | 19985 | 75.76 |
| Benton | 19250 | 73.78 |
| Bremer | 18525 | 76.46 |
| Plymouth | 18230 | 73.17 |
| Mahaska | 16705 | 74.46 |
| Winneshiek | 16435 | 78.13 |
| Fayette | 16065 | 76.72 |
| Washington | 15950 | 73.49 |
| Jones | 15940 | 77.01 |
| Carroll | 15600 | 74.96 |
| Buchanan | 15305 | 72.81 |
| Jackson | 15185 | 76.36 |
| Henry | 14885 | 73.49 |
| Poweshiek | 14730 | 77.67 |
| Cedar | 13865 | 75.25 |
| Clayton | 13755 | 75.79 |
| Dickinson | 13495 | 80.76 |
| Hardin | 13240 | 75.25 |
| Delaware | 13195 | 74.11 |
| Buena Vista | 13110 | 65.29 |
| Tama | 12940 | 72.43 |
| Clay | 12605 | 75.59 |
| Jefferson | 12345 | 73.83 |
| Page | 12330 | 76.92 |
| Iowa | 12325 | 75.43 |
| Floyd | 12225 | 75.05 |
| Kossuth | 12095 | 77.43 |
| Hamilton | 11705 | 74.29 |
| Butler | 11360 | 76.27 |
| Harrison | 11300 | 75.48 |
| Madison | 11270 | 72.29 |
| Mills | 11150 | 73.79 |
| Crawford | 11045 | 64.84 |
| O'Brien | 10805 | 75.30 |
| Cass | 10695 | 76.78 |
| Allamakee | 10510 | 73.44 |
| Appanoose | 9945 | 76.94 |
| Wright | 9695 | 73.01 |
| Union | 9475 | 75.98 |
| Grundy | 9415 | 75.90 |
| Chickasaw | 9395 | 75.34 |
| Cherokee | 9385 | 77.82 |
| Shelby | 9295 | 75.94 |
| Hancock | 8595 | 75.30 |
| Winnebago | 8370 | 76.86 |
| Lyon | 8325 | 71.89 |
| Guthrie | 8315 | 75.66 |
| Montgomery | 8150 | 75.53 |
| Mitchell | 8110 | 75.13 |
| Keokuk | 8010 | 75.92 |
| Louisa | 8005 | 69.16 |
| Sac | 7975 | 76.76 |
| Calhoun | 7720 | 79.14 |
| Franklin | 7705 | 71.98 |
| Emmet | 7665 | 74.24 |
| Humboldt | 7425 | 75.30 |
| Palo Alto | 7330 | 77.32 |
| Monona | 7175 | 77.15 |
| Howard | 7145 | 74.51 |
| Greene | 7130 | 76.01 |
| Lucas | 6605 | 73.23 |
| Clarke | 6585 | 71.19 |
| Decatur | 6455 | 76.39 |
| Davis | 6180 | 70.83 |
| Monroe | 5995 | 75.41 |
| Adair | 5945 | 77.21 |
| Van Buren | 5870 | 77.08 |
| Worth | 5825 | 76.59 |
| Pocahontas | 5755 | 77.72 |
| Fremont | 5715 | 76.46 |
| Ida | 5440 | 76.19 |
| Wayne | 4895 | 76.85 |
| Osceola | 4770 | 73.33 |
| Audubon | 4750 | 77.36 |
| Taylor | 4750 | 74.74 |
| Ringgold | 3865 | 75.05 |
| Adams | 3210 | 78.58 |
