RANKING · 2025 ESTIMATES · 14 SHOWN OF 14

Most population lost, Massachusetts counties

Massachusetts counties that lost the most residents from the 2020 census to 2025, by raw count of people rather than percentage. This list covers the 14 counties in Massachusetts that qualify, ranked against each other statewide.

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SAME RANKING BYCities States Metros

YEAR2000 2010 2020 2025

RANKPLACESTATEPOPPOPULATION CHANGEVS 2000

01Suffolk County, MAMA791,891-6,045−123%

02Hampden County, MAMA464,338-1,487+1713%

03Berkshire County, MAMA128,224-802−82%

04Franklin County, MAMA70,698-331−123%

05Nantucket County, MAMA14,758+503−86%

06Dukes County, MAMA21,219+619−82%

07Hampshire County, MAMA164,065+1,757−69%

08Barnstable County, MAMA233,539+4,543−87%

09Norfolk County, MAMA739,749+13,768−60%

10Bristol County, MAMA593,640+14,440−49%

11Plymouth County, MAMA546,829+16,010−57%

12Essex County, MAMA826,653+16,824−68%

13Worcester County, MAMA888,502+26,391−36%

14Middlesex County, MAMA1,669,979+37,977−43%

SHOWING 1–14 OF 14

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UPDATED 2026-07-15 · DATA: US CENSUS BUREAU POPULATION ESTIMATES