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.

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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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

SHOWING 1–21 OF 21

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UPDATED 2026-08-08 · DATA: US CENSUS BUREAU POPULATION ESTIMATES