Population in New Hampshire by County

Total population.

U.S. Census Bureau · ACS 5-year 2020-2024 · Updated November 2026

New Hampshire

1,394,868

Counties

10

Highest

Hillsborough

426,378

Lowest

Coos

31,271

All New Hampshire counties, ranked

# Counties Population
1 Hillsborough 426,378
2 Rockingham 319,082
3 Merrimack 155,967
4 Strafford 132,575
5 Grafton 92,120
6 Cheshire 77,297
7 Belknap 64,659
8 Carroll 51,804
9 Sullivan 43,715
10 Coos 31,271

About this dataset

Total population. Source: ACS 5-year 2020-2024 Data Profile, variable DP05_0001E. Values in people.

Source
U.S. Census Bureau
Citation
U.S. Census Bureau, American Community Survey 5-Year Estimates Data Profiles (2020-2024), DP05_0001E
Vintage
ACS 5-year 2020-2024
License
Public domain (U.S. Census Bureau)
Unit
people
Available at
State · County · ZIP code
Territory roll-up
Summed across each territory
Last loaded
November 2026

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Population by county in other states

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US Population nationwide