# Counties in New Hampshire by population density, 2025

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

- Indicator id: `population_density`
- Unit: inhabitants per km²
- Definition: Resident population divided by land area in km². World Bank figures use mid-year population and land area excluding inland water.
- Source: U.S. Census Bureau, Population Estimates Program resident population on 1 July divided by land area from the latest Census Gazetteer files, persons per km² (https://www2.census.gov/programs-surveys/popest/datasets/2020-2025/)
- Retrieved: 2026-10-09
- Citation: U.S. Census Bureau. Population Estimates Program resident population on 1 July divided by land area from the latest Census Gazetteer files, persons per km². https://www2.census.gov/programs-surveys/popest/datasets/2020-2025/. Retrieved 2026-10-09.
- Web page: https://invokely.ai/rankings/population-density/new-hampshire-counties
- CSV: https://invokely.ai/download/rankings/population-density/new-hampshire-counties.csv

| Rank | Place | inhabitants per km² |
|---:|---|---:|
| 1 | Hillsborough County | 190.9 |
| 2 | Rockingham County | 179.9 |
| 3 | Strafford County | 141.9 |
| 4 | Merrimack County | 65.4 |
| 5 | Belknap County | 62.6 |
| 6 | Cheshire County | 42.8 |
| 7 | Sullivan County | 31.6 |
| 8 | Carroll County | 21.9 |
| 9 | Grafton County | 21.1 |
| 10 | Coos County | 6.7 |