RANKING · 2024 ACS · 21 SHOWN OF 21

Youngest by median age, New Jersey counties

New Jersey counties with the youngest median age (2023 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

RELATEDOldest by median age Most foreign-born residents Highest uninsured rate Most women Most men Highest disability rate

YEAR1990 2000 2010 2020 2024

RANKPLACESTATEPOPMEDIAN AGEVS 2000

01Hudson County, NJNJ735,03335.8+7%

02Cumberland County, NJNJ157,14837.7+6%

03Essex County, NJNJ896,37937.7+9%

04Passaic County, NJNJ531,62438.1+9%

05Camden County, NJNJ535,79938.8+8%

06Union County, NJNJ601,86339.1+7%

07Mercer County, NJNJ399,28939.5+10%

08Middlesex County, NJNJ883,33539.5+11%

09Gloucester County, NJNJ312,63840.1+11%

10Ocean County, NJNJ673,74641.2+0%

11Burlington County, NJNJ481,43941.7+12%

12Somerset County, NJNJ356,48641.8+12%

13Salem County, NJNJ66,28041.9+10%

14Bergen County, NJNJ977,02642.0+7%

15Atlantic County, NJNJ278,65742.3+14%

16Morris County, NJNJ524,25142.6+13%

17Monmouth County, NJNJ651,03543.2+15%

18Sussex County, NJNJ148,06343.8+18%

19Warren County, NJNJ112,95344.0+17%

20Hunterdon County, NJNJ131,78146.1+19%

21Cape May County, NJNJ93,39051.8+22%

SHOWING 1–21 OF 21

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UPDATED 2026-06-02 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES