RANKING · 2025 ESTIMATES · 14 SHOWN OF 14

Fastest shrinking, Massachusetts counties

Massachusetts counties with the steepest population decline from the 2020 census to 2025. This list covers the 14 counties in Massachusetts that qualify, ranked against each other statewide. The median across all 14 is +2.1%. Biggest climber in the top 100 since 2020: Suffolk County, MA, up 11 places to #1.

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SAME RANKING BYCities States Metros

RELATEDLargest by population Fastest growing Most population gained Most population lost Most densely populated Most sparsely populated

YEAR2000 2010 2020 2025

RANKPLACESTATEPOPPOPULATION GROWTHVS 2000

01▲11Suffolk County, MAMA791,891-0.8%−4.7 pts

02▼1Berkshire County, MAMA128,224-0.6%+2.5 pts

03▼1Franklin County, MAMA70,698-0.5%−2.5 pts

04▼1Hampden County, MAMA464,338-0.3%−0.3 pts

05▼1Hampshire County, MAMA164,065+1.1%−2.8 pts

06▲3Norfolk County, MAMA739,749+1.9%−3.7 pts

07▼1Barnstable County, MAMA233,539+2.0%−17.1 pts

08▲3Essex County, MAMA826,653+2.1%−5.9 pts

09▲1Middlesex County, MAMA1,669,979+2.3%−2.5 pts

10▼5Bristol County, MAMA593,640+2.5%−3.1 pts

11▲2Dukes County, MAMA21,219+3.0%−25.8 pts

12▼5Plymouth County, MAMA546,829+3.0%−5.6 pts

13▼5Worcester County, MAMA888,502+3.1%−2.8 pts

14Nantucket County, MAMA14,758+3.5%−54.8 pts

SHOWING 1–14 OF 14

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UPDATED 2026-09-11 · DATA: US CENSUS BUREAU POPULATION ESTIMATES