RANKING · 2025 ESTIMATES · 21 SHOWN OF 21

Fastest growing, New Jersey counties

New Jersey counties ranked by population growth 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 shrinking Most population gained Most population lost Most densely populated Most sparsely populated

YEAR2000 2010 2020 2025

RANKPLACESTATEPOPPOPULATION GROWTHVS 2000

01Ocean County, NJNJ673,746+5.7%−68%

02Union County, NJNJ601,863+4.6%−21%

03Burlington County, NJNJ481,439+4.2%−41%

04Essex County, NJNJ896,379+3.8%+91%

05Gloucester County, NJNJ312,638+3.4%−68%

06Somerset County, NJNJ356,486+3.2%−86%

07Mercer County, NJNJ399,289+3.1%−60%

08Warren County, NJNJ112,953+3.0%−74%

09Morris County, NJNJ524,251+2.9%−75%

10Sussex County, NJNJ148,063+2.7%−74%

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

12Middlesex County, NJNJ883,335+2.3%−80%

13Bergen County, NJNJ977,026+2.2%−69%

14Salem County, NJNJ66,280+2.2%−244%

15Hunterdon County, NJNJ131,781+2.2%−83%

16Cumberland County, NJNJ157,148+1.9%−68%

17Atlantic County, NJNJ278,657+1.5%−88%

18Passaic County, NJNJ531,624+1.4%−82%

19Hudson County, NJNJ735,033+1.4%−86%

20Monmouth County, NJNJ651,035+1.2%−90%

21Cape May County, NJNJ93,390-2.0%−126%

SHOWING 1–21 OF 21

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