Iowa 2013 Population By County
Updated on June 22, 2021.

According to the US Census Bureau population estimates, there were 3,092,997 people living in Iowa in 2013. Polk County was the most populated county with 452,657 residents, followed by Linn County with 216,488 residents, and Scott County with 170,201 residents. Adams County with a population of 3,891 was the least populated county in Iowa in 2013.

Use the map below to interactively explore the population of each county in Iowa in 2013. The data can also be explored further by sorting and filtering with the table below.

Iowa 2013 Population By County
See also Population estimate for other years:
Table of Iowa 2013 Population By County
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County Population % of State Population
Adair 7,387 0.24%
Adams 3,891 0.13%
Allamakee 14,071 0.46%
Appanoose 12,654 0.41%
Audubon 5,863 0.19%
Benton 25,699 0.83%
Black Hawk 132,933 4.30%
Boone 26,284 0.85%
Bremer 24,579 0.80%
Buchanan 21,026 0.68%
Buena Vista 20,649 0.67%
Butler 14,975 0.48%
Calhoun 9,898 0.32%
Carroll 20,541 0.66%
Cass 13,572 0.44%
Cedar 18,226 0.59%
Cerro Gordo 43,528 1.41%
Cherokee 11,874 0.38%
Chickasaw 12,274 0.40%
Clarke 9,245 0.30%
Clay 16,438 0.53%
Clayton 17,793 0.57%
Clinton 48,281 1.56%
Crawford 17,360 0.56%
Dallas 74,949 2.42%
Davis 8,769 0.28%
Decatur 8,216 0.27%
Delaware 17,473 0.56%
Des Moines 40,395 1.31%
Dickinson 16,878 0.55%
Dubuque 95,945 3.10%
Emmet 9,880 0.32%
Fayette 20,519 0.66%
Floyd 16,023 0.52%
Franklin 10,507 0.34%
Fremont 7,069 0.23%
Greene 9,159 0.30%
Grundy 12,341 0.40%
Guthrie 10,671 0.35%
Hamilton 15,343 0.50%
Hancock 11,131 0.36%
Hardin 17,388 0.56%
Harrison 14,357 0.46%
Henry 20,021 0.65%
Howard 9,439 0.31%
Humboldt 9,677 0.31%
Ida 7,074 0.23%
Iowa 16,281 0.53%
Jackson 19,517 0.63%
Jasper 36,728 1.19%
Jefferson 17,629 0.57%
Johnson 140,151 4.53%
Jones 20,519 0.66%
Keokuk 10,337 0.33%
Kossuth 15,332 0.50%
Lee 35,236 1.14%
Linn 216,488 7.00%
Louisa 11,348 0.37%
Lucas 8,697 0.28%
Lyon 11,695 0.38%
Madison 15,483 0.50%
Mahaska 22,421 0.73%
Marion 33,014 1.07%
Marshall 40,995 1.33%
Mills 14,905 0.48%
Mitchell 10,669 0.35%
Monona 9,032 0.29%
Monroe 7,979 0.26%
Montgomery 10,404 0.34%
Muscatine 43,010 1.39%
O'Brien 14,045 0.45%
Osceola 6,236 0.20%
Page 15,516 0.50%
Palo Alto 9,164 0.30%
Plymouth 24,931 0.81%
Pocahontas 7,112 0.23%
Polk 452,657 14.64%
Pottawattamie 92,855 3.00%
Poweshiek 18,606 0.60%
Ringgold 4,971 0.16%
Sac 10,030 0.32%
Scott 170,201 5.50%
Shelby 11,899 0.39%
Sioux 34,503 1.12%
Story 93,877 3.04%
Tama 17,430 0.56%
Taylor 6,233 0.20%
Union 12,616 0.41%
Van Buren 7,434 0.24%
Wapello 35,507 1.15%
Warren 47,358 1.53%
Washington 21,944 0.71%
Wayne 6,385 0.21%
Webster 37,327 1.21%
Winnebago 10,430 0.34%
Winneshiek 20,840 0.67%
Woodbury 102,284 3.31%
Worth 7,489 0.24%
Wright 12,982 0.42%