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 2022, at 29%. Dallas County had the lowest, at 13.2%. The median was 22.3% and the figure for Iowa was 18.9%. Source: the U.S. Census Bureau.

Highest29Dickinson County
Lowest13.2Dallas County
Median22.399 counties
Iowa18.9History

Top 40 counties, 2022

CSVChart (SVG)

Dickinson CountyDickinson County: 29 %29Jefferson CountyJefferson County: 29 %29Cherokee CountyCherokee County: 26.5 %26.5Ringgold CountyRinggold County: 26.3 %26.3Audubon CountyAudubon County: 26 %26Kossuth CountyKossuth County: 25.8 %25.8Butler CountyButler County: 25.5 %25.5Clayton CountyClayton County: 25.5 %25.5Monona CountyMonona County: 25.5 %25.5Hancock CountyHancock County: 25.2 %25.2Sac CountySac County: 25.1 %25.1Greene CountyGreene County: 25 %25Palo Alto CountyPalo Alto County: 25 %25Guthrie CountyGuthrie County: 24.9 %24.9Emmet CountyEmmet County: 24.7 %24.7Pocahontas CountyPocahontas County: 24.7 %24.7Cerro Gordo CountyCerro Gordo County: 24.7 %24.7Cass CountyCass County: 24.6 %24.6Fremont CountyFremont County: 24.6 %24.6Calhoun CountyCalhoun County: 24.5 %24.5Shelby CountyShelby County: 24.5 %24.5Appanoose CountyAppanoose County: 24.5 %24.5Page CountyPage County: 24.2 %24.2Van Buren CountyVan Buren County: 24.2 %24.2Hardin CountyHardin County: 24.1 %24.1Adams CountyAdams County: 24 %24Fayette CountyFayette County: 23.9 %23.9Allamakee CountyAllamakee County: 23.9 %23.9Mitchell CountyMitchell County: 23.8 %23.8Adair CountyAdair County: 23.8 %23.8Taylor CountyTaylor County: 23.8 %23.8Montgomery CountyMontgomery County: 23.8 %23.8Winnebago CountyWinnebago County: 23.7 %23.7Winneshiek CountyWinneshiek County: 23.6 %23.6Lee CountyLee County: 23.6 %23.6Ida CountyIda County: 23.6 %23.6Worth CountyWorth County: 23.4 %23.4Chickasaw CountyChickasaw County: 23.4 %23.4Clay CountyClay County: 23.3 %23.3Jackson CountyJackson County: 23.1 %23.1
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-09.

Full ranking

RankCounties2022 (%)Change on 2021
1Dickinson County29+0.8 pts
2Jefferson County29+0.9 pts
3Cherokee County26.5+0.4 pts
4Ringgold County26.3+0.1 pts
5Audubon County26+0.6 pts
6Kossuth County25.8+0.3 pts
7Butler County25.5+0.4 pts
8Clayton County25.5+0.6 pts
9Monona County25.5+0.5 pts
10Hancock County25.2+0.2 pts
11Sac County25.1+0.3 pts
12Greene County25+0.3 pts
13Palo Alto County25+0.7 pts
14Guthrie County24.9+0.7 pts
15Emmet County24.7+0.8 pts
16Pocahontas County24.7+0.4 pts
17Cerro Gordo County24.7+0.6 pts
18Cass County24.6+0.2 pts
19Fremont County24.6+1.1 pts
20Calhoun County24.5+0.4 pts
21Shelby County24.5+0.6 pts
22Appanoose County24.5+0.4 pts
23Page County24.2+0.4 pts
24Van Buren County24.2+0.5 pts
25Hardin County24.1+0.2 pts
26Adams County24+0.4 pts
27Fayette County23.9+0.5 pts
28Allamakee County23.9+0.5 pts
29Mitchell County23.8+0.5 pts
30Adair County23.8+0.5 pts
31Taylor County23.8-0.3 pts
32Montgomery County23.8+0.3 pts
33Winnebago County23.7+0.8 pts
34Winneshiek County23.6+0.8 pts
35Lee County23.6+0.3 pts
36Ida County23.6+0.3 pts
37Worth County23.4+0.4 pts
38Chickasaw County23.4+0.9 pts
39Clay County23.3+0.5 pts
40Jackson County23.1+0.5 pts
41Floyd County22.9+0.2 pts
42Franklin County22.9+0.5 pts
43Keokuk County22.7+0.3 pts
44Des Moines County22.6+0.4 pts
45Lucas County22.5+0.3 pts
46Grundy County22.5+0.6 pts
47Wright County22.5+0.2 pts
48O'Brien County22.5+0.2 pts
49Carroll County22.3+0.4 pts
50Poweshiek County22.3+0.4 pts
51Osceola County22.2+0.4 pts
52Monroe County22+0.5 pts
53Humboldt County22+0.1 pts
54Union County22+0.4 pts
55Wayne County21.9+0.5 pts
56Delaware County21.9+0.6 pts
57Howard County21.7+0.1 pts
58Hamilton County21.7+0.1 pts
59Tama County21.6+0.5 pts
60Jones County21.6+0.2 pts
61Washington County21.6+0.5 pts
62Cedar County21.5+0.4 pts
63Decatur County21.3+0.3 pts
64Harrison County21.2+0.2 pts
65Clinton County21.1+0.4 pts
66Boone County21.1+0.6 pts
67Louisa County21+0.5 pts
68Iowa County21+0.6 pts
69Bremer County20.9+0.3 pts
70Henry County20.6+0.4 pts
71Marion County20.5+0.3 pts
72Clarke County20.5+0.5 pts
73Webster County20.4+0.6 pts
74Mills County20.4+0.4 pts
75Jasper County20.2+0.4 pts
76Dubuque County20.1+0.5 pts
77Plymouth County20.1+0.6 pts
78Mahaska County19.9+0.2 pts
79Buchanan County19.7+0.4 pts
80Marshall County19.7+0.2 pts
81Benton County19.4+0.5 pts
82Wapello County19.2+0.3 pts
83Pottawattamie County19.1+0.5 pts
84Muscatine County19+0.5 pts
85Crawford County19+0.2 pts
85Madison County19+0.3 pts
87Lyon County18.9+0.2 pts
88Black Hawk County18.6+0.4 pts
89Davis County18.4+0.4 pts
90Scott County18.2+0.5 pts
91Linn County17.7+0.5 pts
92Warren County17.4+0.3 pts
93Buena Vista County16.8+0.5 pts
94Sioux County16.4+0.3 pts
95Woodbury County15.9+0.2 pts
96Polk County14.8+0.4 pts
97Story County13.9+0.4 pts
98Johnson County13.6+0.4 pts
99Dallas County13.2+0.3 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 29% in 2022, according to the U.S. Census Bureau.

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

Dallas County, with 13.2% in 2022.

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