Massachusetts Citizen Population By County in 2021 (ACS-5Yrs)

Based on the US Census Bureau's special tabulation from the ACS 5-year estimates, in 2021, the citizen population for Massachusetts was 6,439,195 and represented 92.10% of the total Massachusetts population.

Among all Massachusetts counties, Middlesex had the highest citizen population (1.45M), followed by Worcester (805.74K), and Essex (740.80K).

In terms of percentages, Franklin had the highest percentage of its population being citizens (98.08%), followed by Berkshire (97.94%), 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.