Massachusetts Citizen Population By County in 2011 (ACS-5Yrs)

Updated on March 28, 2026.

Based on the US Census Bureau's special tabulation from the ACS 5-year estimates, in 2011, the citizen population for Massachusetts was 6,025,725 and represented 92.53% of the total Massachusetts population.

Among all Massachusetts counties, Middlesex had the highest citizen population (1.34M), followed by Worcester (749.19K), and Essex (685.20K).

In terms of percentages, Franklin had the highest percentage of its population being citizens (98.20%), followed by Berkshire (97.79%), and Dukes (97.16%).

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 2011
Massachusetts Citizen Population By County in 2011
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County Citizen Population % of County Population
Middlesex 1341780 89.95
Worcester 749190 94.24
Essex 685195 92.66
Norfolk 624630 93.73
Suffolk 599335 84.05
Bristol 522315 95.43
Plymouth 475530 96.47
Hampden 443535 95.85
Barnstable 209915 96.90
Hampshire 150705 95.61
Berkshire 128315 97.79
Franklin 70210 98.20
Dukes 15890 97.16
Nantucket 9175 90.53