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 2024, at 35.4%. Suffolk County had the lowest, at 13.9%. The median was 20% and the figure for Massachusetts was 19.4%. Source: the U.S. Census Bureau.

Highest35.4Barnstable County
Lowest13.9Suffolk County
Median2014 counties
Massachusetts19.4History

All counties, 2024

CSVChart (SVG)

Barnstable CountyBarnstable County: 35.4 %35.4Dukes CountyDukes County: 30 %30Berkshire CountyBerkshire County: 26.9 %26.9Franklin CountyFranklin County: 26.9 %26.9Plymouth CountyPlymouth County: 21.6 %21.6Hampshire CountyHampshire County: 21.5 %21.5Essex CountyEssex County: 20.1 %20.1Hampden CountyHampden County: 20 %20Bristol CountyBristol County: 19.5 %19.5Norfolk CountyNorfolk County: 19.5 %19.5Worcester CountyWorcester County: 18.5 %18.5Nantucket CountyNantucket County: 18 %18Middlesex CountyMiddlesex County: 17.6 %17.6Suffolk CountySuffolk County: 13.9 %13.9
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-09.

Full ranking

RankCounties2024 (%)Change on 2023
1Barnstable County35.4+0.9 pts
2Dukes County30+0.5 pts
3Berkshire County26.9+0.6 pts
4Franklin County26.9+0.8 pts
5Plymouth County21.6+0.5 pts
6Hampshire County21.5+0.7 pts
7Essex County20.1+0.4 pts
8Hampden County20+0.4 pts
9Bristol County19.5+0.4 pts
10Norfolk County19.5+0.5 pts
11Worcester County18.5+0.5 pts
12Nantucket County18+0.3 pts
13Middlesex County17.6+0.3 pts
14Suffolk County13.9+0.2 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 35.4% in 2024, according to the U.S. Census Bureau.

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

Suffolk County, with 13.9% 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 Massachusetts: more rankings