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 2020, at 32.5%. Suffolk County had the lowest, at 12.6%. The median was 18.2% and the figure for Massachusetts was 17.6%. Source: the U.S. Census Bureau.

Highest32.5Barnstable County
Lowest12.6Suffolk County
Median18.214 counties
Massachusetts17.6History

All counties, 2020

CSVChart (SVG)

Barnstable CountyBarnstable County: 32.5 %32.5Dukes CountyDukes County: 27.2 %27.2Berkshire CountyBerkshire County: 24.4 %24.4Franklin CountyFranklin County: 23.5 %23.5Hampshire CountyHampshire County: 20.8 %20.8Plymouth CountyPlymouth County: 19.5 %19.5Essex CountyEssex County: 18.2 %18.2Hampden CountyHampden County: 18.2 %18.2Bristol CountyBristol County: 17.9 %17.9Norfolk CountyNorfolk County: 17.7 %17.7Worcester CountyWorcester County: 16.6 %16.6Middlesex CountyMiddlesex County: 16.1 %16.1Nantucket CountyNantucket County: 16 %16Suffolk CountySuffolk County: 12.6 %12.6
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-09.

Full ranking

RankCounties2020 (%)
1Barnstable County32.5
2Dukes County27.2
3Berkshire County24.4
4Franklin County23.5
5Hampshire County20.8
6Plymouth County19.5
7Essex County18.2
8Hampden County18.2
9Bristol County17.9
10Norfolk County17.7
11Worcester County16.6
12Middlesex County16.1
13Nantucket County16
14Suffolk County12.6

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 32.5% in 2020, according to the U.S. Census Bureau.

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

Suffolk County, with 12.6% in 2020.

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