New Hampshire 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 New Hampshire was 1,099,485 and represented 79.22% of the total New Hampshire population.

Among all New Hampshire counties, Hillsborough had the highest citizen voting-age population (323.02K), followed by Rockingham (252.44K), and Merrimack (124.00K).

In terms of percentages, Carroll had the highest percentage of its population being citizens of voting-age (84.54%), followed by Coos (82.67%), and Sullivan (81.39%).

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.

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New Hampshire Citizen Voting-age Population By County in 2023
New Hampshire Citizen Voting-age Population By County in 2023
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County Citizen Voting-age Population % of County Population
Hillsborough 323025 76.05
Rockingham 252440 79.59
Merrimack 124000 79.99
Strafford 106175 80.59
Grafton 74550 81.25
Cheshire 62275 80.93
Belknap 52315 81.36
Carroll 43335 84.54
Sullivan 35430 81.39
Coos 25945 82.67