# Counties in Iowa by average household size, 2024

All 99 values come from U.S. Census Bureau for 2024, so the places are comparable.

- Indicator id: `average_household_size`
- Unit: persons per household
- Definition: Average number of persons per private household. EU countries: EU-SILC. United States: American Community Survey five-year estimate of people in households divided by occupied housing units, where the period shown is the last year of the five-year span.
- Source: U.S. Census Bureau, American Community Survey 5-year estimates, table B25010: average household size of occupied housing units (https://www2.census.gov/programs-surveys/acs/summary_file/2024/table-based-SF/data/5YRData/acsdt5y2024-b25010.dat)
- Publisher page: https://invokely.ai/en/publishers/us-census-bureau
- Retrieved: 2026-10-12
- Citation: U.S. Census Bureau. American Community Survey 5-year estimates, table B25010: average household size of occupied housing units. https://www2.census.gov/programs-surveys/acs/summary_file/2024/table-based-SF/data/5YRData/acsdt5y2024-b25010.dat. Retrieved 2026-10-12.
- Web page: https://invokely.ai/rankings/average-household-size/iowa-counties

| Rank | Place | persons per household |
|---:|---|---:|
| 1 | Davis County | 2.8 |
| 2 | Lyon County | 2.7 |
| 3 | Sioux County | 2.7 |
| 4 | Mills County | 2.6 |
| 5 | Buena Vista County | 2.6 |
| 6 | Warren County | 2.6 |
| 7 | Woodbury County | 2.5 |
| 8 | Dallas County | 2.5 |
| 9 | Marshall County | 2.5 |
| 10 | Crawford County | 2.5 |
| 10 | Madison County | 2.5 |
| 10 | Wayne County | 2.5 |
| 13 | Benton County | 2.5 |
| 13 | Buchanan County | 2.5 |
| 13 | Louisa County | 2.5 |
| 16 | Washington County | 2.5 |
| 17 | Van Buren County | 2.5 |
| 18 | Plymouth County | 2.5 |
| 18 | Tama County | 2.5 |
| 18 | Wapello County | 2.5 |
| 21 | Howard County | 2.5 |
| 22 | Bremer County | 2.4 |
| 23 | Mahaska County | 2.4 |
| 24 | Keokuk County | 2.4 |
| 24 | Muscatine County | 2.4 |
| 24 | Polk County | 2.4 |
| 24 | Pottawattamie County | 2.4 |
| 28 | Butler County | 2.4 |
| 28 | Henry County | 2.4 |
| 28 | Jasper County | 2.4 |
| 28 | Jones County | 2.4 |
| 28 | Marion County | 2.4 |
| 33 | Boone County | 2.4 |
| 33 | Grundy County | 2.4 |
| 35 | Monroe County | 2.4 |
| 36 | Cedar County | 2.4 |
| 36 | Shelby County | 2.4 |
| 38 | Harrison County | 2.4 |
| 38 | O'Brien County | 2.4 |
| 38 | Ringgold County | 2.4 |
| 41 | Decatur County | 2.4 |
| 41 | Delaware County | 2.4 |
| 41 | Linn County | 2.4 |
| 41 | Wright County | 2.4 |
| 45 | Clarke County | 2.3 |
| 45 | Clinton County | 2.3 |
| 45 | Iowa County | 2.3 |
| 45 | Johnson County | 2.3 |
| 45 | Scott County | 2.3 |
| 50 | Chickasaw County | 2.3 |
| 50 | Lucas County | 2.3 |
| 52 | Allamakee County | 2.3 |
| 52 | Floyd County | 2.3 |
| 52 | Franklin County | 2.3 |
| 52 | Jackson County | 2.3 |
| 52 | Taylor County | 2.3 |
| 57 | Black Hawk County | 2.3 |
| 57 | Dubuque County | 2.3 |
| 57 | Pocahontas County | 2.3 |
| 60 | Appanoose County | 2.3 |
| 61 | Adams County | 2.3 |
| 61 | Guthrie County | 2.3 |
| 61 | Worth County | 2.3 |
| 64 | Calhoun County | 2.3 |
| 64 | Carroll County | 2.3 |
| 64 | Hamilton County | 2.3 |
| 64 | Union County | 2.3 |
| 68 | Fremont County | 2.3 |
| 68 | Hardin County | 2.3 |
| 68 | Osceola County | 2.3 |
| 71 | Palo Alto County | 2.3 |
| 71 | Story County | 2.3 |
| 73 | Adair County | 2.3 |
| 73 | Mitchell County | 2.3 |
| 75 | Humboldt County | 2.2 |
| 76 | Clayton County | 2.2 |
| 76 | Hancock County | 2.2 |
| 76 | Page County | 2.2 |
| 76 | Winneshiek County | 2.2 |
| 80 | Cherokee County | 2.2 |
| 80 | Clay County | 2.2 |
| 80 | Fayette County | 2.2 |
| 80 | Ida County | 2.2 |
| 84 | Lee County | 2.2 |
| 84 | Sac County | 2.2 |
| 84 | Webster County | 2.2 |
| 87 | Cass County | 2.2 |
| 87 | Des Moines County | 2.2 |
| 89 | Greene County | 2.2 |
| 90 | Montgomery County | 2.2 |
| 91 | Kossuth County | 2.2 |
| 92 | Monona County | 2.2 |
| 92 | Poweshiek County | 2.2 |
| 92 | Winnebago County | 2.2 |
| 95 | Emmet County | 2.2 |
| 96 | Cerro Gordo County | 2.1 |
| 97 | Audubon County | 2.1 |
| 97 | Jefferson County | 2.1 |
| 99 | Dickinson County | 2 |