# Counties in Iowa by share of population aged 65 and over, 2025

All 99 values come from U.S. Census Bureau for 2025, so the places are comparable.

- Indicator id: `population_65_plus_share`
- Unit: %
- Definition: Residents aged 65 or over as a percentage of total population. Spain: 1 January, INE annual census. United States: 1 July, Census Bureau population estimates. World Bank figures for other countries and the World refer to mid-year.
- Source: U.S. Census Bureau, Population Estimates Program, county population by age and sex (cc-est agesex): residents aged 65 and over as a percentage of the total, 1 July; states and the nation summed from counties (https://www2.census.gov/programs-surveys/popest/datasets/2020-2025/counties/asrh/cc-est2025-agesex-all.csv)
- Retrieved: 2026-10-09
- Citation: U.S. Census Bureau. Population Estimates Program, county population by age and sex (cc-est agesex): residents aged 65 and over as a percentage of the total, 1 July; states and the nation summed from counties. https://www2.census.gov/programs-surveys/popest/datasets/2020-2025/counties/asrh/cc-est2025-agesex-all.csv. Retrieved 2026-10-09.
- Web page: https://invokely.ai/rankings/population-65-plus/iowa-counties
- CSV: https://invokely.ai/download/rankings/population-65-plus/iowa-counties.csv

| Rank | Place | % |
|---:|---|---:|
| 1 | Jefferson County | 30.7 |
| 2 | Dickinson County | 30.6 |
| 3 | Ringgold County | 28.4 |
| 4 | Clayton County | 27.6 |
| 5 | Audubon County | 27.1 |
| 6 | Monona County | 27.1 |
| 7 | Hancock County | 27 |
| 8 | Butler County | 26.9 |
| 9 | Guthrie County | 26.9 |
| 10 | Kossuth County | 26.9 |
| 11 | Cherokee County | 26.8 |
| 12 | Cerro Gordo County | 26.7 |
| 13 | Greene County | 26.6 |
| 14 | Sac County | 26.6 |
| 15 | Pocahontas County | 26.6 |
| 16 | Winneshiek County | 26.4 |
| 17 | Adams County | 26.3 |
| 18 | Van Buren County | 25.8 |
| 19 | Calhoun County | 25.7 |
| 20 | Cass County | 25.6 |
| 21 | Shelby County | 25.6 |
| 22 | Appanoose County | 25.6 |
| 23 | Emmet County | 25.5 |
| 24 | Fayette County | 25.4 |
| 25 | Allamakee County | 25.4 |
| 26 | Palo Alto County | 25.4 |
| 27 | Page County | 25.4 |
| 28 | Fremont County | 25.2 |
| 29 | Jackson County | 25.2 |
| 30 | Adair County | 25.2 |
| 31 | Hardin County | 25.1 |
| 32 | Montgomery County | 24.9 |
| 33 | Clay County | 24.9 |
| 34 | Chickasaw County | 24.9 |
| 35 | Taylor County | 24.8 |
| 36 | Winnebago County | 24.8 |
| 37 | Mitchell County | 24.8 |
| 38 | Humboldt County | 24.8 |
| 39 | Lee County | 24.8 |
| 40 | Worth County | 24.7 |
| 41 | Ida County | 24.6 |
| 42 | Poweshiek County | 24.2 |
| 43 | Floyd County | 24 |
| 44 | Delaware County | 24 |
| 45 | Carroll County | 23.9 |
| 46 | Keokuk County | 23.8 |
| 47 | Des Moines County | 23.7 |
| 48 | Osceola County | 23.7 |
| 49 | Howard County | 23.7 |
| 50 | Lucas County | 23.5 |
| 51 | Iowa County | 23.4 |
| 52 | Harrison County | 23.4 |
| 53 | Grundy County | 23.3 |
| 54 | Cedar County | 23.2 |
| 55 | Hamilton County | 23.2 |
| 56 | Franklin County | 22.9 |
| 57 | Louisa County | 22.8 |
| 58 | Monroe County | 22.8 |
| 59 | Tama County | 22.8 |
| 60 | Jones County | 22.8 |
| 61 | Decatur County | 22.7 |
| 62 | Washington County | 22.6 |
| 63 | Clinton County | 22.6 |
| 64 | Wright County | 22.6 |
| 65 | Boone County | 22.6 |
| 66 | Henry County | 22.5 |
| 67 | Union County | 22.4 |
| 68 | O'Brien County | 22.3 |
| 69 | Wayne County | 22.3 |
| 70 | Bremer County | 22.1 |
| 71 | Marion County | 21.9 |
| 72 | Mills County | 21.7 |
| 73 | Jasper County | 21.7 |
| 74 | Dubuque County | 21.5 |
| 75 | Benton County | 21.4 |
| 76 | Mahaska County | 21.4 |
| 77 | Clarke County | 21.4 |
| 78 | Plymouth County | 21.3 |
| 79 | Webster County | 21.1 |
| 80 | Buchanan County | 20.8 |
| 81 | Pottawattamie County | 20.8 |
| 82 | Crawford County | 20.5 |
| 83 | Madison County | 20.3 |
| 84 | Muscatine County | 20.2 |
| 85 | Marshall County | 20 |
| 86 | Wapello County | 19.8 |
| 87 | Scott County | 19.7 |
| 88 | Davis County | 19.6 |
| 89 | Lyon County | 19.5 |
| 90 | Black Hawk County | 19.3 |
| 91 | Linn County | 19 |
| 92 | Buena Vista County | 18.6 |
| 93 | Warren County | 18.4 |
| 94 | Sioux County | 17.8 |
| 95 | Woodbury County | 16.9 |
| 96 | Polk County | 15.9 |
| 97 | Johnson County | 15.3 |
| 98 | Story County | 15 |
| 99 | Dallas County | 14.5 |