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

Based on the US Census ACS-5Yrs estimates, in 2021, the voting-age population of New Hampshire was 1.11M which was 81.01% of the total New Hampshire population. Among all New Hampshire counties, Hillsborough had the highest voting-age population (334.68K), followed by Rockingham (252.29K), and Merrimack (123.76K).

On the other hand, the counties with the least voting-age population were: Coos (26.33K), Sullivan (35.09K), and Carroll (42.14K).

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.