Data / Rankings / Median age / Counties in Massachusetts

Counties in Massachusetts by median age

Barnstable County had the highest median age of 14 counties in 2023, at 55.1 years. Suffolk County had the lowest, at 33.8 years. The median was 40.9 years and the figure for Massachusetts was 40 years. Source: the U.S. Census Bureau.

Highest55.1Barnstable County
Lowest33.8Suffolk County
Median40.914 counties
Massachusetts40History

All counties, 2023

CSVChart (SVG)

Barnstable CountyBarnstable County: 55.1 years55.1Dukes CountyDukes County: 50.4 years50.4Berkshire CountyBerkshire County: 47.8 years47.8Franklin CountyFranklin County: 47.3 years47.3Plymouth CountyPlymouth County: 42.9 years42.9Essex CountyEssex County: 41.1 years41.1Bristol CountyBristol County: 40.9 years40.9Norfolk CountyNorfolk County: 40.9 years40.9Nantucket CountyNantucket County: 40.8 years40.8Worcester CountyWorcester County: 40.3 years40.3Hampden CountyHampden County: 39.8 years39.8Middlesex CountyMiddlesex County: 38.9 years38.9Hampshire CountyHampshire County: 38.7 years38.7Suffolk CountySuffolk County: 33.8 years33.8
years. Source: U.S. Census Bureau. Retrieved 2026-10-08.

Full ranking

RankCounties2023
years		Change on 2022
1Barnstable County55.1+0.6
2Dukes County50.4+1.2
3Berkshire County47.8+0.3
4Franklin County47.3+0.2
5Plymouth County42.9+0.2
6Essex County41.1+0.2
7Bristol County40.9-0.1
7Norfolk County40.9+0.2
9Nantucket County40.8+0.3
10Worcester County40.3+0.1
11Hampden County39.8+0.3
12Middlesex County38.9+0.1
13Hampshire County38.7-0.6
14Suffolk County33.8+0.2

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/2023/table-based-SF/data/5YRData/acsdt5y2023-b01002.dat. Retrieved 2026-10-08.

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Questions

Which county has the highest median age?

Barnstable County, with 55.1 years in 2023, according to the U.S. Census Bureau.

Which county has the lowest median age?

Suffolk County, with 33.8 years in 2023.

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