RANKING · 2020 CENSUS · 21 SHOWN OF 21

Youngest by median age, New Jersey counties · 2020

New Jersey counties with the youngest median age (2020 ACS). This list covers the 21 counties in New Jersey that qualify, ranked against each other statewide. The median across all 21 is 41.6.

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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

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 2026-09-11 · DATA: US CENSUS BUREAU DECENNIAL CENSUS