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RANKING · 2020 CENSUS · 14 SHOWN OF 14

Largest American population, Massachusetts counties · 2020

Massachusetts counties ranked by the number of residents who are American ancestry, from the 2020 American Community Survey detailed-origin tables. Each list covers the full eligible universe; download the complete data as CSV. This list covers the 14 counties in Massachusetts that qualify, ranked against each other statewide. The median across all 14 is 18,692.

American ancestry: full group profile →
SAME RANKING BYCitiesStatesMetros
Largest American population by state
RANKPLACESTATEPOPAMERICAN POPULATIONVS 2010
01Middlesex County, MAMA1,669,97954,385+26%
02Worcester County, MAMA888,50252,251+108%
03Norfolk County, MAMA739,74929,394+43%
04Essex County, MAMA826,65322,689−15%
05Plymouth County, MAMA546,82922,328+23%
06Hampden County, MAMA464,33819,885+66%
07Suffolk County, MAMA791,89118,692+34%
08Bristol County, MAMA593,64016,442+23%
09Barnstable County, MAMA233,5398,928−64%
10Hampshire County, MAMA164,0657,534+84%
11Berkshire County, MAMA128,2245,397+37%
12Franklin County, MAMA70,6983,074+9%
13Nantucket County, MAMA14,758614−47%
14Dukes County, MAMA21,219499−69%
SHOWING 1–14 OF 14

UPDATED 2026-09-11 · DATA: US CENSUS BUREAU DECENNIAL CENSUS