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%−126%

02Monmouth County, NJNJ651,035+1.2%−90%

03Hudson County, NJNJ735,033+1.4%−86%

04Passaic County, NJNJ531,624+1.4%−82%

05Atlantic County, NJNJ278,657+1.5%−88%

06Cumberland County, NJNJ157,148+1.9%−68%

07Hunterdon County, NJNJ131,781+2.2%−83%

08Salem County, NJNJ66,280+2.2%−244%

09Bergen County, NJNJ977,026+2.2%−69%

10Middlesex County, NJNJ883,335+2.3%−80%

11Camden County, NJNJ535,799+2.4%+94%

12Sussex County, NJNJ148,063+2.7%−74%

13Morris County, NJNJ524,251+2.9%−75%

14Warren County, NJNJ112,953+3.0%−74%

15Mercer County, NJNJ399,289+3.1%−60%

16Somerset County, NJNJ356,486+3.2%−86%

17Gloucester County, NJNJ312,638+3.4%−68%

18Essex County, NJNJ896,379+3.8%+91%

19Burlington County, NJNJ481,439+4.2%−41%

20Union County, NJNJ601,863+4.6%−21%

21Ocean County, NJNJ673,746+5.7%−68%

SHOWING 1–21 OF 21

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UPDATED 2026-07-15 · DATA: US CENSUS BUREAU POPULATION ESTIMATES