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

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

Barnstable County had the highest share of population aged 65 and over of 14 counties in 2025, at 36.4%. Suffolk County had the lowest, at 14.2%. The median was 20.5% and the figure for Massachusetts was 19.9%. Source: the U.S. Census Bureau.

Highest36.4Barnstable County
Lowest14.2Suffolk County
Median20.514 counties
Massachusetts19.9History

All counties, 2025

CSVChart (SVG)

Barnstable CountyBarnstable County: 36.4 %36.4Dukes CountyDukes County: 31 %31Franklin CountyFranklin County: 27.7 %27.7Berkshire CountyBerkshire County: 27.7 %27.7Plymouth CountyPlymouth County: 22.2 %22.2Hampshire CountyHampshire County: 22.1 %22.1Essex CountyEssex County: 20.7 %20.7Hampden CountyHampden County: 20.4 %20.4Bristol CountyBristol County: 20 %20Norfolk CountyNorfolk County: 20 %20Worcester CountyWorcester County: 19 %19Nantucket CountyNantucket County: 18.4 %18.4Middlesex CountyMiddlesex County: 18 %18Suffolk CountySuffolk County: 14.2 %14.2
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-09.

Full ranking

RankCounties2025 (%)Change on 2024
1Barnstable County36.4+1 pts
2Dukes County31+1 pts
3Franklin County27.7+0.8 pts
4Berkshire County27.7+0.8 pts
5Plymouth County22.2+0.6 pts
6Hampshire County22.1+0.7 pts
7Essex County20.7+0.6 pts
8Hampden County20.4+0.4 pts
9Bristol County20+0.5 pts
10Norfolk County20+0.5 pts
11Worcester County19+0.5 pts
12Nantucket County18.4+0.3 pts
13Middlesex County18+0.4 pts
14Suffolk County14.2+0.4 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 36.4% in 2025, according to the U.S. Census Bureau.

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

Suffolk County, with 14.2% in 2025.

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