Iowa Non-Hispanic White Alone Citizen 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 population for Iowa was 3,246,485 and represented 105.42% of the total Iowa citizen population.

Among all Iowa counties, Polk had the highest Non-Hispanic White Alone citizen population (371.96K), followed by Linn (193.05K), and Scott (137.49K).

In terms of percentages, Mitchell had the highest percentage of its citizen population being Non-Hispanic White Alone (97.46%), followed by Grundy (97.10%), and Davis (96.90%).

The chart and table below shows the Non-Hispanic White Alone citizen population of each county and the percentage of each county's citizen 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 Population By County in 2021
Iowa Non-Hispanic White Alone Citizen Population By County in 2021
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County Citizen Population % of County Citizen Population
Polk 371960 80.19
Linn 193050 86.86
Scott 137485 80.46
Johnson 116135 82.56
Black Hawk 104275 82.57
Dubuque 88660 91.33
Pottawattamie 81000 88.42
Story 80955 88.15
Dallas 80660 87.43
Woodbury 74485 74.63
Warren 48505 93.98
Clinton 42210 91.31
Cerro Gordo 38710 90.41
Jasper 34965 94.26
Des Moines 33675 87.31
Muscatine 32730 78.74
Webster 31880 87.69
Marion 31410 94.88
Sioux 30745 89.44
Lee 30460 90.84
Wapello 28420 83.74
Marshall 27540 74.72
Boone 25120 94.63
Benton 24600 96.15
Bremer 23470 95.19
Plymouth 23130 92.95
Mahaska 20400 93.00
Washington 20245 91.63
Buchanan 19690 96.52
Carroll 19550 95.16
Jones 19345 93.77
Winneshiek 19010 95.91
Jackson 18555 95.67
Fayette 18255 94.41
Henry 17970 89.20
Cedar 17575 95.86
Poweshiek 17005 93.03
Delaware 16870 96.48
Dickinson 16595 96.23
Clayton 16405 96.27
Iowa 15665 94.82
Madison 15535 94.87
Hardin 15530 93.02
Clay 15180 93.02
Floyd 14175 90.81
Harrison 13975 96.08
Kossuth 13905 94.82
Butler 13820 96.71
Page 13775 91.10
Mills 13715 94.29
Tama 13575 82.37
Hamilton 13340 90.17
O'Brien 12945 92.90
Allamakee 12620 92.12
Jefferson 12535 87.47
Cass 12445 96.03
Grundy 11900 97.10
Buena Vista 11800 65.16
Appanoose 11620 94.90
Chickasaw 11445 95.81
Union 11430 95.13
Lyon 11365 96.23
Shelby 11055 95.38
Wright 10955 86.70
Cherokee 10755 92.80
Crawford 10590 72.53
Mitchell 10160 97.46
Hancock 10040 93.53
Guthrie 10030 95.98
Winnebago 9750 91.98
Keokuk 9635 96.50
Montgomery 9625 93.31
Calhoun 9330 94.10
Sac 9250 94.87
Howard 9045 96.53
Humboldt 8910 94.44
Davis 8750 96.90
Franklin 8455 87.89
Louisa 8455 83.22
Palo Alto 8350 93.93
Greene 8310 94.59
Monona 8240 94.44
Lucas 8195 96.53
Emmet 8125 89.04
Clarke 7860 84.74
Monroe 7190 94.79
Decatur 7075 93.22
Adair 7070 95.80
Worth 7005 94.47
Van Buren 6920 96.51
Ida 6575 95.01
Pocahontas 6540 93.83
Fremont 6305 94.39
Wayne 6225 96.14
Osceola 5425 90.87
Audubon 5410 96.26
Taylor 5330 92.86
Ringgold 4495 95.33
Adams 3555 96.21