RANKING · 2020 CENSUS · 21 SHOWN OF 21

Youngest by median age, New Jersey counties · 2020

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, NJNJ735,03334.8+4%

02Essex County, NJNJ896,37937.1+7%

03Passaic County, NJNJ531,62437.9+9%

04Cumberland County, NJNJ157,14838.2+7%

05Mercer County, NJNJ399,28938.5+7%

06Union County, NJNJ601,86338.7+6%

07Middlesex County, NJNJ883,33538.8+9%

08Camden County, NJNJ535,79939.1+9%

09Gloucester County, NJNJ312,63840.1+11%

10Ocean County, NJNJ673,74641.5+1%

11Burlington County, NJNJ481,43941.6+12%

12Bergen County, NJNJ977,02642.0+7%

13Somerset County, NJNJ356,48642.0+13%

14Salem County, NJNJ66,28042.1+11%

15Atlantic County, NJNJ278,65742.5+15%

16Morris County, NJNJ524,25142.6+13%

17Monmouth County, NJNJ651,03543.5+15%

18Warren County, NJNJ112,95344.4+18%

19Sussex County, NJNJ148,06345.3+22%

20Hunterdon County, NJNJ131,78146.8+21%

21Cape May County, NJNJ93,39051.5+22%

SHOWING 1–21 OF 21

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