RANKING · 1990 CENSUS · 21 SHOWN OF 21

Youngest by median age, New Jersey counties · 1990

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

01Gloucester County, NJNJ312,63832.5−10%

02Camden County, NJNJ535,79932.8−8%

03Sussex County, NJNJ148,06333.0−11%

04Burlington County, NJNJ481,43933.0−11%

05Hudson County, NJNJ735,03333.3−1%

06Passaic County, NJNJ531,62433.5−4%

07Essex County, NJNJ896,37933.5−3%

08Middlesex County, NJNJ883,33533.5−6%

09Cumberland County, NJNJ157,14833.5−6%

10Atlantic County, NJNJ278,65734.1−8%

11Mercer County, NJNJ399,28934.2−5%

12Warren County, NJNJ112,95334.4−8%

13Somerset County, NJNJ356,48634.9−6%

14Monmouth County, NJNJ651,03535.0−7%

15Hunterdon County, NJNJ131,78135.1−10%

16Salem County, NJNJ66,28035.2−7%

17Morris County, NJNJ524,25135.3−7%

18Union County, NJNJ601,86335.9−2%

19Cape May County, NJNJ93,39037.7−11%

20Bergen County, NJNJ977,02637.7−3%

21Ocean County, NJNJ673,74638.5−6%

SHOWING 1–21 OF 21

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