New Hampshire Citizen Population By County in 2015 (ACS-5Yrs)

Updated on March 28, 2026.

Based on the US Census Bureau's special tabulation from the ACS 5-year estimates, in 2015, the citizen population for New Hampshire was 1,288,640 and represented 97.32% of the total New Hampshire population.

Among all New Hampshire counties, Hillsborough had the highest citizen population (386.72K), followed by Rockingham (293.56K), and Merrimack (144.05K).

In terms of percentages, Sullivan had the highest percentage of its population being citizens (99.29%), followed by Belknap (98.76%), and Cheshire (98.56%).

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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New Hampshire Citizen Population By County in 2015
New Hampshire Citizen Population By County in 2015
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County Citizen Population % of County Population
Hillsborough 386715 95.73
Rockingham 293555 98.18
Merrimack 144050 97.82
Strafford 121760 97.19
Grafton 86525 96.85
Cheshire 75330 98.56
Belknap 59650 98.76
Carroll 46825 98.55
Sullivan 42830 99.29
Coos 31405 98.54