Data / Rankings / Population aged 65 and over / Counties in Iowa

Counties in Iowa by share of population aged 65 and over

Dickinson County had the highest share of population aged 65 and over of 99 counties in 2024, at 30.2%. Dallas County had the lowest, at 14%. The median was 23% and the figure for Iowa was 19.6%. Source: the U.S. Census Bureau.

Highest30.2Dickinson County
Lowest14Dallas County
Median2399 counties
Iowa19.6History

Top 40 counties, 2024

CSVChart (SVG)

Dickinson CountyDickinson County: 30.2 %30.2Jefferson CountyJefferson County: 30.2 %30.2Ringgold CountyRinggold County: 28.1 %28.1Clayton CountyClayton County: 26.9 %26.9Butler CountyButler County: 26.7 %26.7Audubon CountyAudubon County: 26.6 %26.6Kossuth CountyKossuth County: 26.6 %26.6Cherokee CountyCherokee County: 26.5 %26.5Monona CountyMonona County: 26.5 %26.5Hancock CountyHancock County: 26.5 %26.5Guthrie CountyGuthrie County: 26.4 %26.4Greene CountyGreene County: 26.3 %26.3Cerro Gordo CountyCerro Gordo County: 26.1 %26.1Sac CountySac County: 26.1 %26.1Pocahontas CountyPocahontas County: 26 %26Winneshiek CountyWinneshiek County: 25.7 %25.7Emmet CountyEmmet County: 25.6 %25.6Calhoun CountyCalhoun County: 25.5 %25.5Cass CountyCass County: 25.4 %25.4Adams CountyAdams County: 25.3 %25.3Appanoose CountyAppanoose County: 25.2 %25.2Fremont CountyFremont County: 25.2 %25.2Palo Alto CountyPalo Alto County: 25.2 %25.2Van Buren CountyVan Buren County: 25 %25Page CountyPage County: 25 %25Fayette CountyFayette County: 24.9 %24.9Hardin CountyHardin County: 24.9 %24.9Shelby CountyShelby County: 24.9 %24.9Montgomery CountyMontgomery County: 24.8 %24.8Allamakee CountyAllamakee County: 24.7 %24.7Taylor CountyTaylor County: 24.7 %24.7Adair CountyAdair County: 24.6 %24.6Mitchell CountyMitchell County: 24.6 %24.6Winnebago CountyWinnebago County: 24.6 %24.6Worth CountyWorth County: 24.5 %24.5Jackson CountyJackson County: 24.5 %24.5Lee CountyLee County: 24.4 %24.4Ida CountyIda County: 24.4 %24.4Chickasaw CountyChickasaw County: 24.4 %24.4Clay CountyClay County: 24 %24
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-09.

Full ranking

RankCounties2024 (%)Change on 2023
1Dickinson County30.2+0.5 pts
2Jefferson County30.2+0.4 pts
3Ringgold County28.1+0.5 pts
4Clayton County26.9+0.6 pts
5Butler County26.7+0.6 pts
6Audubon County26.6+0.3 pts
7Kossuth County26.6+0.4 pts
8Cherokee County26.5-0 pts
9Monona County26.5+0.9 pts
10Hancock County26.5+0.7 pts
11Guthrie County26.4+0.9 pts
12Greene County26.3+0.4 pts
13Cerro Gordo County26.1+0.7 pts
14Sac County26.1+0.6 pts
15Pocahontas County26+0.8 pts
16Winneshiek County25.7+1 pts
17Emmet County25.6+0.5 pts
18Calhoun County25.5+0.4 pts
19Cass County25.4+0.6 pts
20Adams County25.3+0.6 pts
21Appanoose County25.2+0.5 pts
22Fremont County25.2-0 pts
23Palo Alto County25.2+0.2 pts
24Van Buren County25+0.5 pts
25Page County25+0.2 pts
26Fayette County24.9+0.6 pts
27Hardin County24.9+0.3 pts
28Shelby County24.9+0.4 pts
29Montgomery County24.8+0.4 pts
30Allamakee County24.7+0.7 pts
31Taylor County24.7+0.7 pts
32Adair County24.6+0.4 pts
33Mitchell County24.6+0.3 pts
34Winnebago County24.6+0.4 pts
35Worth County24.5+0.5 pts
36Jackson County24.5+0.6 pts
37Lee County24.4+0.4 pts
38Ida County24.4+0.5 pts
39Chickasaw County24.4+0.4 pts
40Clay County24+0.4 pts
41Humboldt County23.7+0.8 pts
42Floyd County23.5+0.6 pts
43Keokuk County23.5+0.4 pts
44Osceola County23.5+0.4 pts
45Poweshiek County23.5+0.7 pts
46Delaware County23.4+0.8 pts
47Des Moines County23.4+0.4 pts
48Carroll County23.3+0.6 pts
49Lucas County23.2+0.3 pts
50Grundy County23+0.1 pts
51Howard County22.9+0.6 pts
52Franklin County22.8-0.3 pts
53Cedar County22.7+0.6 pts
54Monroe County22.7+0.2 pts
55Hamilton County22.6+0.4 pts
56Wright County22.6-0.1 pts
57Harrison County22.6+0.8 pts
58Iowa County22.6+0.8 pts
59Tama County22.5+0.3 pts
60Wayne County22.5+0.1 pts
61Union County22.4+0.2 pts
62Jones County22.4+0.2 pts
63Decatur County22.3+0.8 pts
64Henry County22.3+0.7 pts
65Washington County22.3+0.4 pts
66Boone County22.2+0.5 pts
67O'Brien County22.2-0 pts
68Clinton County22.1+0.5 pts
69Louisa County22+0.4 pts
70Bremer County21.6+0.4 pts
71Marion County21.5+0.4 pts
72Clarke County21.2+0.4 pts
73Mills County21.1+0.4 pts
74Dubuque County21.1+0.5 pts
75Jasper County21.1+0.4 pts
76Mahaska County21+0.7 pts
77Webster County21+0.1 pts
78Plymouth County20.9+0.4 pts
79Benton County20.8+0.6 pts
80Buchanan County20.6+0.6 pts
81Pottawattamie County20.2+0.5 pts
82Crawford County20+0.5 pts
83Madison County19.9+0.5 pts
84Muscatine County19.9+0.4 pts
85Marshall County19.8+0.1 pts
86Wapello County19.5+0.1 pts
87Davis County19.3+0.4 pts
88Scott County19.2+0.5 pts
89Lyon County19.1+0.1 pts
90Black Hawk County19.1+0.2 pts
91Linn County18.6+0.5 pts
92Warren County18+0.3 pts
93Buena Vista County17.9+0.6 pts
94Sioux County17.3+0.4 pts
95Woodbury County16.6+0.3 pts
96Polk County15.5+0.3 pts
97Johnson County14.7+0.6 pts
98Story County14.6+0.3 pts
99Dallas County14+0.5 pts

Other periods

About this ranking

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.

Every value in the ranking comes from the same publisher and the same period, so the counties are compared on one definition. Equal values share a rank.

How to cite

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.

Use this data in your AI agent

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Rank Counties in Iowa by share of population aged 65 and over using official data, and cite the source.
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Questions

Which county has the highest share of population aged 65 and over?

Dickinson County, with 30.2% in 2024, according to the U.S. Census Bureau.

Which county has the lowest share of population aged 65 and over?

Dallas County, with 14% in 2024.

Where does this ranking come from?

Every value comes from one source and one period, so the places are comparable: 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. Retrieved 2026-10-09.

Population aged 65 and over: other rankings

Counties in Iowa: more rankings