RANKING · 2020 CENSUS · 14 SHOWN OF 14

Most population gained, Massachusetts counties · 2020

Massachusetts counties that added 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

01Middlesex County, MAMA1,669,979+128,917+93%

02Suffolk County, MAMA791,891+75,913+193%

03Essex County, MAMA826,653+66,670+25%

04Worcester County, MAMA888,502+63,559+54%

05Norfolk County, MAMA739,749+55,131+61%

06Plymouth County, MAMA546,829+35,900−4%

07Bristol County, MAMA593,640+30,915+9%

08Barnstable County, MAMA233,539+13,108−63%

09Hampshire County, MAMA164,065+4,228−26%

10Nantucket County, MAMA14,758+4,083+16%

11Dukes County, MAMA21,219+4,065+21%

12Hampden County, MAMA464,338+2,335−2948%

13Franklin County, MAMA70,698-343−124%

14Berkshire County, MAMA128,224-2,193−50%

SHOWING 1–14 OF 14

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