# Counties in New Jersey by median age, 2024

All 21 values come from U.S. Census Bureau for 2024, so the places are comparable.

- Indicator id: `median_age`
- Unit: years
- Definition: Age that divides the resident population into two halves of equal size. Spain and the EU: on 1 January. United States: American Community Survey five-year estimate, where the period shown is the last year of the five-year span.
- Source: U.S. Census Bureau, American Community Survey 5-year estimates, table B01002: median age, total population (https://www2.census.gov/programs-surveys/acs/summary_file/2024/table-based-SF/data/5YRData/acsdt5y2024-b01002.dat)
- Retrieved: 2026-10-08
- Citation: U.S. Census Bureau. American Community Survey 5-year estimates, table B01002: median age, total population. https://www2.census.gov/programs-surveys/acs/summary_file/2024/table-based-SF/data/5YRData/acsdt5y2024-b01002.dat. Retrieved 2026-10-08.
- Web page: https://invokely.ai/rankings/median-age/new-jersey-counties
- CSV: https://invokely.ai/download/rankings/median-age/new-jersey-counties.csv

| Rank | Place | years |
|---:|---|---:|
| 1 | Cape May County | 51.8 |
| 2 | Hunterdon County | 46.1 |
| 3 | Warren County | 44 |
| 4 | Sussex County | 43.8 |
| 5 | Monmouth County | 43.2 |
| 6 | Morris County | 42.6 |
| 7 | Atlantic County | 42.3 |
| 8 | Bergen County | 42 |
| 9 | Salem County | 41.9 |
| 10 | Somerset County | 41.8 |
| 11 | Burlington County | 41.7 |
| 12 | Ocean County | 41.2 |
| 13 | Gloucester County | 40.1 |
| 14 | Mercer County | 39.5 |
| 14 | Middlesex County | 39.5 |
| 16 | Union County | 39.1 |
| 17 | Camden County | 38.8 |
| 18 | Passaic County | 38.1 |
| 19 | Cumberland County | 37.7 |
| 19 | Essex County | 37.7 |
| 21 | Hudson County | 35.8 |