RANKING · 2024 ACS · 21 SHOWN OF 21

Youngest by median age, New Jersey counties

New Jersey counties with the youngest median age (2024 ACS). This list covers the 21 counties in New Jersey that qualify, ranked against each other statewide. The median across all 21 is 41.7.

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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, NJNJ735,03335.8+7%

02▲2Cumberland County, NJNJ157,14837.7+6%

03▼1Essex County, NJNJ896,37937.7+9%

04▼1Passaic County, NJNJ531,62438.1+9%

05▲3Camden County, NJNJ535,79938.8+8%

06Union County, NJNJ601,86339.1+7%

07▼2Mercer County, NJNJ399,28939.5+10%

08▼1Middlesex County, NJNJ883,33539.5+11%

09Gloucester County, NJNJ312,63840.1+11%

10Ocean County, NJNJ673,74641.20%

11Burlington County, NJNJ481,43941.7+12%

12▲1Somerset County, NJNJ356,48641.8+12%

13▲1Salem County, NJNJ66,28041.9+10%

14▼2Bergen County, NJNJ977,02642.0+7%

15Atlantic County, NJNJ278,65742.3+14%

16Morris County, NJNJ524,25142.6+13%

17Monmouth County, NJNJ651,03543.2+15%

18▲1Sussex County, NJNJ148,06343.8+18%

19▼1Warren 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 2026-09-11 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES