Atlas Info

Counties of Iowa

Iowa has 99 counties, home to 3,238,387 people across 144,660 km². Each county below opens its full profile — Census Bureau and American Community Survey figures, and how it ranks against the rest of Iowa and the country.

Counties
99
Population
3,238,387
2025 estimate
#32 of 51 states
Area
144,660 km²
#23 of 51 states
Density
22
per km²
#38 of 51 states
How Iowa's counties spread

Across Iowa's counties: the middle value, where the state ranks among all states (1 = highest median), and which county is highest and lowest. Medians rather than totals, since most of these are rates that cannot be added up.

Amenities & Infrastructure
IndicatorMedian
Households with Broadband202487.2%
Median Gross Rent2024$820
Median Home Value2024$160,600
Owner-Occupied Homes202476.5%
Vacant Homes20249.5%
Demography
IndicatorMedian
Aged 65 and Over202421.4%
American Indian & Alaska Native20240.1%
Asian, non-Hispanic20240.6%
Average Household Size2024people2.3
Black, non-Hispanic20240.8%
Foreign-Born20242.3%
Hispanic or Latino20243.7%
Median Age2024years42.1
Sex Ratio2024per 1,000 males987
Speak a Language Other Than English20244.5%
Under 18202422.8%
Veterans20246.9%
White, non-Hispanic202491.3%
Economy
IndicatorMedian
Below Poverty Line202410.1%
Households on SNAP20248.4%
Income Inequality2024index0.433
Median Household Income2024$71,223
Per Capita Income2024$37,942
Unemployment Rate20243.2%
Education
IndicatorMedian
Bachelor's Degree or Higher202422.3%
High School or Higher202493.5%
Health Coverage
IndicatorMedian
No Health Insurance20244.8%
With a Disability202413.7%
Population & Density
IndicatorMedian
Population202514,901
Population Density2025/km²10
Work & Commute
IndicatorMedian
Commute by Public Transit20240.1%
Households with No Vehicle20244.9%
Mean Commute Time2024minutes20.4
Work from Home20248.9%
All counties
CountyPopulation 2025
Adair County7,403
Adams County3,617
Allamakee County14,238
Appanoose County12,077
Audubon County5,509
Benton County26,004
Black Hawk County131,532
Boone County26,799
Bremer County25,296
Buchanan County20,883
Buena Vista County20,449
Butler County14,049
Calhoun County9,562
Carroll County20,303
Cass County12,960
Cedar County18,359
Cerro Gordo County42,372
Cherokee County11,369
Chickasaw County11,663
Clarke County9,574
Clay County16,202
Clayton County16,845
Clinton County46,002
Crawford County16,237
Dallas County118,457
Davis County9,230
Decatur County7,655
Delaware County17,674
Des Moines County38,077
Dickinson County18,077
Dubuque County99,381
Emmet County9,107
Fayette County19,047
Floyd County14,901
Franklin County9,868
Fremont County6,522
Greene County8,658
Grundy County12,361
Guthrie County10,782
Hamilton County14,944
Hancock County10,528
Hardin County16,455
Harrison County14,623
Henry County19,349
Howard County9,415
Humboldt County9,409
Ida County6,777
Iowa County16,504
Jackson County19,288
Jasper County38,153
Jefferson County15,291
Johnson County160,044
Jones County21,253
Keokuk County9,797
Kossuth County14,322
Lee County32,306
Linn County232,028
Louisa County10,416
Lucas County8,847
Lyon County12,354
Madison County17,270
Mahaska County21,880
Marion County34,192
Marshall County39,890
Mills County14,793
Mitchell County10,650
Monona County8,539
Monroe County7,406
Montgomery County10,002
Muscatine County41,853
O'Brien County14,220
Osceola County5,980
Page County14,856
Palo Alto County8,899
Plymouth County25,697
Pocahontas County6,819
Polk County516,546
Pottawattamie County92,996
Poweshiek County18,368
Ringgold County4,642
Sac County9,525
Scott County175,259
Shelby County11,689
Sioux County36,774
Story County101,291
Tama County16,796
Taylor County5,835
Union County11,829
Van Buren County7,131
Wapello County35,210
Warren County57,331
Washington County22,667
Wayne County6,738
Webster County36,838
Winnebago County10,251
Winneshiek County19,733
Woodbury County106,649
Worth County7,338
Wright County12,801
Compare Iowa's counties on a map, add layers and run a scatter — open the atlas, or browse all 3,144 US counties or all states.