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.

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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%

03Warren County, NJNJ112,95344.0+17%

04Sussex County, NJNJ148,06343.8+18%

05Monmouth County, NJNJ651,03543.2+15%

06Morris County, NJNJ524,25142.6+13%

07Atlantic County, NJNJ278,65742.3+14%

08Bergen County, NJNJ977,02642.0+7%

09Salem County, NJNJ66,28041.9+10%

10Somerset County, NJNJ356,48641.8+12%

11Burlington County, NJNJ481,43941.7+12%

12Ocean County, NJNJ673,74641.2+0%

13Gloucester County, NJNJ312,63840.1+11%

14Mercer County, NJNJ399,28939.5+10%

15Middlesex County, NJNJ883,33539.5+11%

16Union County, NJNJ601,86339.1+7%

17Camden County, NJNJ535,79938.8+8%

18Passaic County, NJNJ531,62438.1+9%

19Cumberland 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 2026-07-15 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES