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

Based on the US Census ACS-5Yrs estimates, in 2021, the voting-age population of Massachusetts was 5.60M which was 80.12% of the total Massachusetts population. Among all Massachusetts counties, Middlesex had the highest voting-age population (1.30M), followed by Worcester (675.79K), and Suffolk (661.35K).

On the other hand, the counties with the least voting-age population were: Nantucket (11.15K), Dukes (16.64K), and Franklin (58.76K).

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

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