Data / Rankings / Median age / Counties in Massachusetts

Counties in Massachusetts by median age, 2024

Barnstable County had the highest median age of 14 counties in 2024, at 55.4 years. Suffolk County had the lowest, at 33.9 years. The median was 41.1 years and the figure for Massachusetts was 40 years. Source: the U.S. Census Bureau.

Highest55.4Barnstable County
Lowest33.9Suffolk County
Median41.114 counties
Massachusetts40History

All counties, 2024

CSVChart (SVG)

Barnstable CountyBarnstable County: 55.4 years55.4Dukes CountyDukes County: 50.7 years50.7Berkshire CountyBerkshire County: 47.3 years47.3Franklin CountyFranklin County: 47.2 years47.2Plymouth CountyPlymouth County: 43 years43Nantucket CountyNantucket County: 42.4 years42.4Essex CountyEssex County: 41.2 years41.2Bristol CountyBristol County: 40.9 years40.9Norfolk CountyNorfolk County: 40.9 years40.9Worcester CountyWorcester County: 40.2 years40.2Hampden CountyHampden County: 40 years40Middlesex CountyMiddlesex County: 38.9 years38.9Hampshire CountyHampshire County: 37.4 years37.4Suffolk CountySuffolk County: 33.9 years33.9
years. Source: U.S. Census Bureau. Retrieved 2026-10-08.

Full ranking

RankCounties2024
years		Change on 2023
1Barnstable County55.4+0.3
2Dukes County50.7+0.3
3Berkshire County47.3-0.5
4Franklin County47.2-0.1
5Plymouth County43+0.1
6Nantucket County42.4+1.6
7Essex County41.2+0.1
8Bristol County40.90
8Norfolk County40.90
10Worcester County40.2-0.1
11Hampden County40+0.2
12Middlesex County38.90
13Hampshire County37.4-1.3
14Suffolk County33.9+0.1

Other periods

About this ranking

Age that divides the resident population into two halves of equal size. Spain and the EU: on 1 January. United States: American Community Survey five-year estimate, where the period shown is the last year of the five-year span.

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. American Community Survey 5-year estimates, table B01002: median age, total population. https://www2.census.gov/programs-surveys/acs/summary_file/2024/table-based-SF/data/5YRData/acsdt5y2024-b01002.dat. Retrieved 2026-10-08.

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Questions

Which county has the highest median age?

Barnstable County, with 55.4 years in 2024, according to the U.S. Census Bureau.

Which county has the lowest median age?

Suffolk County, with 33.9 years 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, American Community Survey 5-year estimates, table B01002: median age, total population. Retrieved 2026-10-08.

Median age: other rankings

Counties in Massachusetts: more rankings