Iowa Citizen Voting-age Population By County in 2012 (ACS-5Yrs)
Based on the US Census Bureau's special tabulation from the ACS 5-year estimates, in 2012, the citizen voting-age population for Iowa was 2,249,700 and represented 73.82% of the total Iowa population.
Among all Iowa counties, Polk had the highest citizen voting-age population (303.81K), followed by Linn (157.17K), and Scott (122.16K).
In terms of percentages, Dickinson had the highest percentage of its population being citizens of voting-age (80.78%), followed by Calhoun (79.82%), and Adams (79.26%).
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 | 303810 | 70.36 |
| Linn | 157165 | 74.15 |
| Scott | 122160 | 73.84 |
| Black Hawk | 99710 | 76.21 |
| Johnson | 98500 | 74.83 |
| Dubuque | 70775 | 75.47 |
| Woodbury | 69865 | 68.53 |
| Story | 68950 | 76.84 |
| Pottawattamie | 68875 | 74.22 |
| Dallas | 45640 | 68.12 |
| Clinton | 37230 | 75.86 |
| Warren | 34185 | 73.93 |
| Cerro Gordo | 34110 | 77.37 |
| Des Moines | 30685 | 76.20 |
| Muscatine | 30085 | 70.41 |
| Webster | 28995 | 76.51 |
| Jasper | 28340 | 76.96 |
| Lee | 27510 | 76.97 |
| Marshall | 27075 | 66.74 |
| Wapello | 26165 | 73.81 |
| Marion | 24785 | 74.23 |
| Sioux | 23385 | 69.24 |
| Boone | 19995 | 75.95 |
| Benton | 19275 | 74.01 |
| Bremer | 18710 | 77.01 |
| Plymouth | 18290 | 73.42 |
| Mahaska | 16740 | 74.63 |
| Winneshiek | 16530 | 78.58 |
| Fayette | 16075 | 76.93 |
| Jones | 16030 | 77.50 |
| Washington | 16015 | 73.58 |
| Carroll | 15540 | 74.89 |
| Buchanan | 15285 | 72.82 |
| Jackson | 15180 | 76.65 |
| Henry | 15100 | 74.61 |
| Poweshiek | 14675 | 77.69 |
| Cedar | 13875 | 75.22 |
| Clayton | 13745 | 76.13 |
| Dickinson | 13555 | 80.78 |
| Buena Vista | 13230 | 65.45 |
| Delaware | 13205 | 74.52 |
| Hardin | 13150 | 75.23 |
| Tama | 12870 | 72.53 |
| Clay | 12640 | 75.92 |
| Iowa | 12315 | 75.46 |
| Page | 12300 | 77.36 |
| Floyd | 12235 | 75.50 |
| Jefferson | 12135 | 72.28 |
| Kossuth | 11980 | 77.24 |
| Hamilton | 11600 | 74.29 |
| Madison | 11350 | 72.62 |
| Butler | 11335 | 76.07 |
| Harrison | 11225 | 75.64 |
| Mills | 11150 | 74.19 |
| Crawford | 10975 | 64.18 |
| O'Brien | 10795 | 75.49 |
| Cass | 10620 | 76.60 |
| Allamakee | 10560 | 73.92 |
| Appanoose | 9925 | 77.18 |
| Wright | 9615 | 72.98 |
| Union | 9490 | 75.77 |
| Grundy | 9440 | 75.94 |
| Cherokee | 9405 | 78.31 |
| Chickasaw | 9350 | 75.34 |
| Shelby | 9260 | 76.15 |
| Hancock | 8580 | 75.80 |
| Lyon | 8335 | 71.70 |
| Winnebago | 8325 | 77.08 |
| Guthrie | 8270 | 75.77 |
| Mitchell | 8145 | 75.70 |
| Montgomery | 8135 | 75.96 |
| Keokuk | 7990 | 76.24 |
| Louisa | 7985 | 69.74 |
| Calhoun | 7930 | 79.82 |
| Sac | 7930 | 76.95 |
| Franklin | 7720 | 72.49 |
| Emmet | 7545 | 73.50 |
| Humboldt | 7380 | 75.15 |
| Palo Alto | 7240 | 77.02 |
| Monona | 7135 | 77.22 |
| Howard | 7100 | 74.19 |
| Greene | 7080 | 76.09 |
| Clarke | 6765 | 72.86 |
| Lucas | 6475 | 72.63 |
| Decatur | 6390 | 76.25 |
| Davis | 6165 | 70.70 |
| Monroe | 5960 | 74.69 |
| Adair | 5900 | 77.33 |
| Van Buren | 5805 | 76.74 |
| Worth | 5805 | 76.58 |
| Fremont | 5680 | 77.02 |
| Pocahontas | 5680 | 77.76 |
| Ida | 5420 | 76.18 |
| Wayne | 4865 | 76.37 |
| Audubon | 4750 | 78.19 |
| Osceola | 4740 | 73.89 |
| Taylor | 4675 | 74.32 |
| Ringgold | 3825 | 74.63 |
| Adams | 3190 | 79.26 |
