# Counties in New Hampshire by population, 2025

All 10 values come from U.S. Census Bureau for 2025, so the places are comparable.

- Indicator id: `population`
- Unit: persons
- Definition: Resident population. Spain and the EU: 1 January, with Spanish figures from the official municipal register (Padrón). United States: Census Bureau population estimates for 1 July. Other countries and the World: World Bank mid-year estimates, which count all residents regardless of legal status or citizenship.
- Source: U.S. Census Bureau, Annual estimates of the resident population for the United States, states and counties, 1 July (Population Estimates Program) (https://www2.census.gov/programs-surveys/popest/datasets/2020-2025/)
- Retrieved: 2026-10-08
- Citation: U.S. Census Bureau. Annual estimates of the resident population for the United States, states and counties, 1 July (Population Estimates Program). https://www2.census.gov/programs-surveys/popest/datasets/2020-2025/. Retrieved 2026-10-08.
- Web page: https://invokely.ai/rankings/population/new-hampshire-counties
- CSV: https://invokely.ai/download/rankings/population/new-hampshire-counties.csv

| Rank | Place | persons |
|---:|---|---:|
| 1 | Hillsborough County | 433,415 |
| 2 | Rockingham County | 324,077 |
| 3 | Merrimack County | 158,078 |
| 4 | Strafford County | 135,043 |
| 5 | Grafton County | 93,225 |
| 6 | Cheshire County | 78,269 |
| 7 | Belknap County | 65,147 |
| 8 | Carroll County | 52,784 |
| 9 | Sullivan County | 43,961 |
| 10 | Coos County | 31,343 |