Massachusetts Citizen Population By County in 2019 (ACS-5Yrs)

Updated on March 28, 2026.

Based on the US Census Bureau's special tabulation from the ACS 5-year estimates, in 2019, the citizen population for Massachusetts was 6,314,695 and represented 92.18% of the total Massachusetts population.

Among all Massachusetts counties, Middlesex had the highest citizen population (1.43M), followed by Worcester (779.22K), and Essex (721.95K).

In terms of percentages, Franklin had the highest percentage of its population being citizens (97.63%), followed by Berkshire (97.50%), and Hampden (96.75%).

The chart and table below shows the citizen population of each county and the percentage of each county's population that were citizens.

You can see similar information for other states and by state for the United States.

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Massachusetts Citizen Population By County in 2019
Massachusetts Citizen Population By County in 2019
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County Citizen Population % of County Population
Middlesex 1429060 89.27
Worcester 779220 94.48
Essex 721950 92.12
Suffolk 673325 84.52
Norfolk 648130 92.53
Bristol 535585 95.46
Plymouth 496415 96.33
Hampden 452660 96.75
Barnstable 205975 96.48
Hampshire 153360 95.24
Berkshire 123265 97.50
Franklin 68900 97.63
Dukes 16485 95.23
Nantucket 10365 92.79