New Hampshire Population By County in 2019

Updated on January 27, 2024.

Based on the US Census Vintage data estimates, in 2019, the population of New Hampshire was 1,360,783. Among all New Hampshire counties, Hillsborough had the highest population (417,738), followed by Rockingham (309,647), and Merrimack (151,606). Coos was the least populated county (31,421).

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 2019
New Hampshire Population By County in 2019
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County Population % of State Population
Belknap 61398 4.51
Carroll 48745 3.58
Cheshire 75880 5.58
Coos 31421 2.31
Grafton 90369 6.64
Hillsborough 417738 30.70
Merrimack 151606 11.14
Rockingham 309647 22.76
Strafford 130716 9.61
Sullivan 43263 3.18