Iowa Non-Hispanic White Alone Citizen Voting-age Population By County in 2015 (ACS-5Yrs)

Updated on March 28, 2026.

Based on the US Census Bureau's special tabulation from the ACS 5-year estimates, in 2015, the Non-Hispanic White Alone citizen voting-age population for Iowa was 2,542,045 and represented 111.24% of the total Iowa citizen voting-age population.

Among all Iowa counties, Polk had the highest Non-Hispanic White Alone citizen voting-age population (278.04K), followed by Linn (148.66K), and Scott (109.15K).

In terms of percentages, Mitchell had the highest percentage of its citizen voting-age population being Non-Hispanic White Alone (99.32%), followed by Monroe (99.32%), and Grundy (98.99%).

The chart and table below shows the Non-Hispanic White Alone citizen voting-age population of each county and the percentage of each county's citizen voting-age population that were Non-Hispanic White Alone.

You can see similar information for other states and by state for the United States.

You can also see similar information for other ethnicities.

See this for other years:
Iowa Non-Hispanic White Alone Citizen Voting-age Population By County in 2015
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County Citizen Voting-age Population % of County Citizen Voting-age Population
Polk 278040 87.58
Linn 148660 92.29
Scott 109145 86.53
Johnson 91530 89.16
Black Hawk 88825 87.75
Dubuque 68880 94.86
Story 66095 92.40
Pottawattamie 64560 93.19
Woodbury 60895 86.98
Dallas 47380 93.40
Clinton 34685 94.54
Warren 34070 96.46
Cerro Gordo 32080 94.21
Des Moines 28230 92.20
Jasper 27215 95.74
Muscatine 26460 86.91
Webster 26440 92.22
Lee 25475 92.69
Marshall 24720 91.10
Marion 24080 96.75
Wapello 24080 94.25
Sioux 22725 95.30
Boone 19590 96.31
Benton 19070 98.89
Bremer 18495 97.52
Plymouth 17790 97.37
Mahaska 16180 96.00
Winneshiek 16145 97.29
Washington 15460 94.70
Fayette 15380 96.07
Jones 15225 95.70
Carroll 15120 97.24
Buchanan 15025 97.98
Jackson 14705 97.16
Henry 14045 91.95
Poweshiek 13825 95.25
Cedar 13650 97.33
Clayton 13420 98.06
Dickinson 13315 97.76
Delaware 12965 98.67
Hardin 12805 96.17
Clay 12245 97.14
Iowa 12105 97.27
Floyd 11725 96.11
Tama 11545 89.32
Page 11540 95.73
Kossuth 11525 97.75
Jefferson 11480 94.56
Madison 11240 98.38
Butler 11185 98.46
Hamilton 10915 95.62
Harrison 10860 97.88
Mills 10770 95.95
Buena Vista 10715 80.87
O'Brien 10285 97.26
Allamakee 10210 97.28
Cass 10195 97.10
Crawford 9635 85.87
Appanoose 9555 97.20
Grundy 9310 98.99
Union 9210 97.05
Chickasaw 9075 98.43
Wright 9060 95.77
Cherokee 8990 96.62
Shelby 8940 98.03
Hancock 8180 96.86
Lyon 8170 97.90
Guthrie 8045 97.52
Mitchell 8035 99.32
Winnebago 7815 95.54
Montgomery 7740 97.05
Keokuk 7700 97.78
Sac 7590 97.25
Calhoun 7525 95.62
Franklin 7240 92.70
Humboldt 7105 97.87
Emmet 7075 94.52
Louisa 7055 89.53
Howard 6940 97.82
Palo Alto 6895 98.57
Monona 6885 95.76
Greene 6825 97.36
Lucas 6340 97.09
Clarke 6275 94.79
Davis 6075 97.98
Decatur 5975 93.87
Monroe 5875 99.32
Worth 5690 96.52
Adair 5680 98.27
Van Buren 5565 97.89
Fremont 5330 96.56
Pocahontas 5290 97.06
Ida 5225 96.76
Wayne 4735 97.53
Audubon 4570 98.60
Osceola 4480 97.29
Taylor 4425 95.37
Ringgold 3750 97.66
Adams 2995 97.88