RANKING · 2024 ACS · 21 SHOWN OF 21

Oldest by median age, New Jersey counties

New Jersey counties ranked by median age of residents (2024 ACS). This list covers the 21 counties in New Jersey that qualify, ranked against each other statewide. The median across all 21 is 41.7.

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SAME RANKING BYCities States Metros ZIP codes

RELATEDLargest foreign-born population Most residents with a disability Largest veteran population Most uninsured people Largest senior population Most unmarried people

YEAR1990 2000 2010 2020 2024

RANKPLACESTATEPOPMEDIAN AGEVS 2000

01Cape May County, NJNJ93,39051.8+22%

02Hunterdon County, NJNJ131,78146.1+19%

03▲1Warren County, NJNJ112,95344.0+17%

04▼1Sussex County, NJNJ148,06343.8+18%

05Monmouth County, NJNJ651,03543.2+15%

06Morris County, NJNJ524,25142.6+13%

07Atlantic County, NJNJ278,65742.3+14%

08▲1Bergen County, NJNJ977,02642.0+7%

09▼1Salem County, NJNJ66,28041.9+10%

10Somerset County, NJNJ356,48641.8+12%

11Burlington County, NJNJ481,43941.7+12%

12Ocean County, NJNJ673,74641.20%

13Gloucester County, NJNJ312,63840.1+11%

14▲3Mercer County, NJNJ399,28939.5+10%

15Middlesex County, NJNJ883,33539.5+11%

16Union County, NJNJ601,86339.1+7%

17▼3Camden County, NJNJ535,79938.8+8%

18▲1Passaic County, NJNJ531,62438.1+9%

19▼1Cumberland County, NJNJ157,14837.7+6%

20Essex County, NJNJ896,37937.7+9%

21Hudson County, NJNJ735,03335.8+7%

SHOWING 1–21 OF 21

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UPDATED 2026-09-11 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES