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

Counties in Massachusetts by share of population aged 65 and over

Barnstable County had the highest share of population aged 65 and over of 14 counties in 2021, at 32.8%. Suffolk County had the lowest, at 13.1%. The median was 18.6% and the figure for Massachusetts was 18%. Source: the U.S. Census Bureau.

Highest32.8Barnstable County
Lowest13.1Suffolk County
Median18.614 counties
Massachusetts18History

All counties, 2021

CSVChart (SVG)

Barnstable CountyBarnstable County: 32.8 %32.8Dukes CountyDukes County: 27.7 %27.7Berkshire CountyBerkshire County: 24.8 %24.8Franklin CountyFranklin County: 24.3 %24.3Plymouth CountyPlymouth County: 19.9 %19.9Hampshire CountyHampshire County: 19.4 %19.4Essex CountyEssex County: 18.7 %18.7Hampden CountyHampden County: 18.5 %18.5Bristol CountyBristol County: 18.2 %18.2Norfolk CountyNorfolk County: 18.1 %18.1Worcester CountyWorcester County: 17 %17Middlesex CountyMiddlesex County: 16.6 %16.6Nantucket CountyNantucket County: 16.6 %16.6Suffolk CountySuffolk County: 13.1 %13.1
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-09.

Full ranking

RankCounties2021 (%)Change on 2020
1Barnstable County32.8+0.4 pts
2Dukes County27.7+0.5 pts
3Berkshire County24.8+0.4 pts
4Franklin County24.3+0.8 pts
5Plymouth County19.9+0.4 pts
6Hampshire County19.4-1.4 pts
7Essex County18.7+0.5 pts
8Hampden County18.5+0.4 pts
9Bristol County18.2+0.3 pts
10Norfolk County18.1+0.4 pts
11Worcester County17+0.4 pts
12Middlesex County16.6+0.5 pts
13Nantucket County16.6+0.6 pts
14Suffolk County13.1+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 Massachusetts by share of population aged 65 and over using official data, and cite the source.
rank_places {"indicator":"population_65_plus_share","level":"province","within":"Massachusetts","limit":10}
GET https://invokely.ai/api/v1/rank?indicator=population_65_plus_share&level=province&within=Massachusetts&limit=10

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Questions

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

Barnstable County, with 32.8% in 2021, according to the U.S. Census Bureau.

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

Suffolk County, with 13.1% in 2021.

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 Massachusetts: more rankings