New Hampshire Population By County in 2017

Updated on January 27, 2024.

Based on the US Census Vintage data estimates, in 2017, the population of New Hampshire was 1,350,395. Among all New Hampshire counties, Hillsborough had the highest population (413,545), followed by Rockingham (306,970), and Merrimack (150,054). Coos was the least populated county (31,418).

Hover over or click on the counties in the map below to see the populations. The data can also be found in a table below. You can use the table to sort, filter, and explore the data further.

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

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New Hampshire Population By County in 2017
New Hampshire Population By County in 2017
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County Population % of State Population
Belknap 60907 4.51
Carroll 48176 3.57
Cheshire 76062 5.63
Coos 31418 2.33
Grafton 90176 6.68
Hillsborough 413545 30.62
Merrimack 150054 11.11
Rockingham 306970 22.73
Strafford 130034 9.63
Sullivan 43053 3.19