RANKING · 2020 CENSUS · 14 SHOWN OF 14

Most population lost, Massachusetts counties · 2020

Massachusetts counties that lost the most residents from the 2010 census to 2020, 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

01Berkshire County, MAMA128,224-2,193−50%

02Franklin County, MAMA70,698-343−124%

03Hampden County, MAMA464,338+2,335−2948%

04Dukes County, MAMA21,219+4,065+21%

05Nantucket County, MAMA14,758+4,083+16%

06Hampshire County, MAMA164,065+4,228−26%

07Barnstable County, MAMA233,539+13,108−63%

08Bristol County, MAMA593,640+30,915+9%

09Plymouth County, MAMA546,829+35,900−4%

10Norfolk County, MAMA739,749+55,131+61%

11Worcester County, MAMA888,502+63,559+54%

12Essex County, MAMA826,653+66,670+25%

13Suffolk County, MAMA791,891+75,913+193%

14Middlesex County, MAMA1,669,979+128,917+93%

SHOWING 1–14 OF 14

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UPDATED 2026-07-15 · DATA: US CENSUS BUREAU DECENNIAL CENSUS