Massachusetts Citizen Voting-age Population By County in 2023 (ACS-5Yrs)

Updated on March 28, 2026.

Based on the US Census Bureau's special tabulation from the ACS 5-year estimates, in 2023, the citizen voting-age population for Massachusetts was 5,120,350 and represented 73.23% of the total Massachusetts population.

Among all Massachusetts counties, Middlesex had the highest citizen voting-age population (1.14M), followed by Worcester (633.21K), and Essex (580.17K).

In terms of percentages, Barnstable had the highest percentage of its population being citizens of voting-age (81.75%), followed by Hampshire (81.49%), and Berkshire (81.33%).

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

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

See this for other years:
Massachusetts Citizen Voting-age Population By County in 2023
Massachusetts Citizen Voting-age Population By County in 2023
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County Citizen Voting-age Population % of County Population
Middlesex 1142910 70.42
Worcester 633210 73.49
Essex 580175 71.87
Suffolk 551265 70.48
Norfolk 525570 72.54
Bristol 431310 74.57
Plymouth 401745 75.53
Hampden 350710 75.77
Barnstable 188095 81.75
Hampshire 127605 81.49
Berkshire 104140 81.33
Franklin 57405 80.94
Dukes 15710 75.71
Nantucket 10505 73.46