# Counties in New Jersey by population density, 2025

All 21 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-jersey-counties
- CSV: https://invokely.ai/download/rankings/population-density/new-jersey-counties.csv

| Rank | Place | inhabitants per km² |
|---:|---|---:|
| 1 | Hudson County | 6,143.8 |
| 2 | Essex County | 2,745 |
| 3 | Union County | 2,261.2 |
| 4 | Bergen County | 1,620.4 |
| 5 | Passaic County | 1,102.8 |
| 6 | Middlesex County | 1,102.6 |
| 7 | Camden County | 934.5 |
| 8 | Mercer County | 686.8 |
| 9 | Monmouth County | 536.9 |
| 10 | Somerset County | 456 |
| 11 | Morris County | 439.1 |
| 12 | Ocean County | 414 |
| 13 | Gloucester County | 374.9 |
| 14 | Burlington County | 232.6 |
| 15 | Atlantic County | 193.7 |
| 16 | Cape May County | 143.4 |
| 17 | Cumberland County | 125.5 |
| 18 | Warren County | 122.3 |
| 19 | Hunterdon County | 118.9 |
| 20 | Sussex County | 110.3 |
| 21 | Salem County | 77.1 |