Iowa Non-Hispanic White Alone Citizen Voting-age Population By County in 2021 (ACS-5Yrs)

Updated on March 28, 2026.

Based on the US Census Bureau's special tabulation from the ACS 5-year estimates, in 2021, the Non-Hispanic White Alone citizen voting-age population for Iowa was 2,600,675 and represented 110.75% of the total Iowa citizen voting-age population.

Among all Iowa counties, Polk had the highest Non-Hispanic White Alone citizen voting-age population (292.85K), followed by Linn (152.93K), and Scott (109.19K).

In terms of percentages, Audubon had the highest percentage of its citizen voting-age population being Non-Hispanic White Alone (98.62%), followed by Grundy (98.40%), and Howard (98.06%).

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 2021
Iowa Non-Hispanic White Alone Citizen Voting-age Population By County in 2021
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County Citizen Voting-age Population % of County Citizen Voting-age Population
Polk 292845 84.81
Linn 152930 90.04
Scott 109190 84.23
Johnson 95740 86.02
Black Hawk 84805 86.34
Dubuque 69895 93.66
Story 68035 89.66
Pottawattamie 63410 91.26
Dallas 59650 89.72
Woodbury 58610 80.50
Warren 36825 95.03
Clinton 33315 93.54
Cerro Gordo 31310 92.70
Jasper 27335 94.86
Des Moines 26950 90.66
Muscatine 25760 83.43
Webster 25600 90.13
Lee 24185 92.20
Marion 24165 95.55
Sioux 23115 93.49
Wapello 22760 88.17
Marshall 22275 82.26
Boone 20000 96.32
Benton 19000 97.09
Bremer 18260 96.11
Plymouth 17660 95.05
Mahaska 15665 94.00
Winneshiek 15580 96.86
Washington 15525 93.98
Jones 15275 94.70
Carroll 14920 95.76
Buchanan 14580 97.04
Jackson 14560 96.42
Fayette 14515 95.78
Henry 14300 91.00
Cedar 13790 96.84
Poweshiek 13675 93.89
Dickinson 13530 97.87
Clayton 12975 97.45
Delaware 12975 97.70
Hardin 12630 94.71
Iowa 12105 95.54
Clay 11885 95.27
Madison 11745 96.31
Page 11300 93.47
Floyd 11135 92.48
Kossuth 10940 96.18
Tama 10835 87.31
Harrison 10805 97.12
Butler 10715 97.54
Hamilton 10600 93.56
Mills 10600 95.58
Jefferson 10420 92.29
O'Brien 10060 95.18
Allamakee 9895 95.33
Cass 9735 97.50
Buena Vista 9650 75.27
Grundy 9205 98.40
Appanoose 9095 96.45
Union 8925 96.49
Chickasaw 8825 97.25
Wright 8725 92.13
Crawford 8655 81.54
Shelby 8620 95.73
Cherokee 8520 95.09
Lyon 8240 97.80
Hancock 7970 95.22
Guthrie 7910 97.53
Mitchell 7730 97.85
Winnebago 7700 93.22
Montgomery 7520 96.41
Keokuk 7480 97.59
Calhoun 7345 95.64
Sac 7270 96.16
Humboldt 6890 96.63
Howard 6815 98.06
Franklin 6790 93.27
Louisa 6765 87.23
Emmet 6665 92.63
Monona 6495 95.87
Palo Alto 6485 95.93
Greene 6465 95.21
Lucas 6335 96.87
Davis 6155 97.08
Clarke 6085 89.16
Worth 5590 95.07
Adair 5555 97.12
Monroe 5555 96.86
Decatur 5500 93.14
Van Buren 5330 97.00
Pocahontas 5115 95.25
Ida 4995 96.24
Fremont 4940 95.83
Wayne 4635 96.76
Audubon 4300 98.62
Osceola 4270 94.16
Taylor 4140 95.06
Ringgold 3455 96.78
Adams 2795 96.38