RANKING · 2010 CENSUS · 21 SHOWN OF 21

Youngest by median age, New Jersey counties · 2010

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, NJNJ735,03334.2+2%

02Passaic County, NJNJ531,62436.1+4%

03Essex County, NJNJ896,37936.4+5%

04Cumberland County, NJNJ157,14836.5+3%

05Middlesex County, NJNJ883,33537.2+4%

06Mercer County, NJNJ399,28937.8+5%

07Camden County, NJNJ535,79937.9+6%

08Union County, NJNJ601,86338.0+4%

09Gloucester County, NJNJ312,63838.7+7%

10Atlantic County, NJNJ278,65739.9+8%

11Somerset County, NJNJ356,48640.2+8%

12Burlington County, NJNJ481,43940.4+9%

13Salem County, NJNJ66,28040.8+7%

14Bergen County, NJNJ977,02641.1+5%

15Monmouth County, NJNJ651,03541.3+10%

16Morris County, NJNJ524,25141.3+9%

17Warren County, NJNJ112,95341.5+10%

18Sussex County, NJNJ148,06341.8+13%

19Ocean County, NJNJ673,74642.6+4%

20Hunterdon County, NJNJ131,78143.5+12%

21Cape May County, NJNJ93,39047.1+11%

SHOWING 1–21 OF 21

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