RANKING · 2025 ESTIMATES · 21 SHOWN OF 21

Fastest shrinking, New Jersey counties

New Jersey counties with the steepest population decline from the 2020 census to 2025. This list covers the 21 counties in New Jersey that qualify, ranked against each other statewide. The median across all 21 is +2.4%. Biggest climber in the top 100 since 2020: Hudson County, NJ, up 18 places to #3.

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SAME RANKING BYCities States Metros

RELATEDLargest by population Fastest growing Most population gained Most population lost Most densely populated Most sparsely populated

YEAR2000 2010 2020 2025

RANKPLACESTATEPOPPOPULATION GROWTHVS 2000

01▲1Cape May County, NJNJ93,390-2.0%−9.6 pts

02▲7Monmouth County, NJNJ651,035+1.2%−10.1 pts

03▲18Hudson County, NJNJ735,033+1.4%−8.7 pts

04▲8Passaic County, NJNJ531,624+1.4%−6.5 pts

05Atlantic County, NJNJ278,657+1.5%−11.1 pts

06▼2Cumberland County, NJNJ157,148+1.9%−4.1 pts

07▼1Hunterdon County, NJNJ131,781+2.2%−11.0 pts

08▼5Salem County, NJNJ66,280+2.2%+3.8 pts

09▲5Bergen County, NJNJ977,026+2.2%−4.9 pts

10▲6Middlesex County, NJNJ883,335+2.3%−9.3 pts

11▼3Camden County, NJNJ535,799+2.4%+1.1 pts

12▼11Sussex County, NJNJ148,063+2.7%−7.4 pts

13▼2Morris County, NJNJ524,251+2.9%−8.7 pts

14▼7Warren County, NJNJ112,953+3.0%−8.8 pts

15Mercer County, NJNJ399,289+3.1%−4.6 pts

16▲1Somerset County, NJNJ356,486+3.2%−20.6 pts

17▼4Gloucester County, NJNJ312,638+3.4%−7.3 pts

18▲1Essex County, NJNJ896,379+3.8%+1.8 pts

19▼9Burlington County, NJNJ481,439+4.2%−2.9 pts

20▼2Union County, NJNJ601,863+4.6%−1.2 pts

21▼1Ocean County, NJNJ673,746+5.7%−12.2 pts

SHOWING 1–21 OF 21

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UPDATED 2026-09-11 · DATA: US CENSUS BUREAU POPULATION ESTIMATES