RANKING · 2020 CENSUS · 21 SHOWN OF 21

Fastest growing, New Jersey counties · 2020

New Jersey counties ranked by population growth from the 2010 census to 2020. 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

01Hudson County, NJNJ735,033+14.3%+4.2 pts

02Ocean County, NJNJ673,746+10.5%−7.4 pts

03Essex County, NJNJ896,379+10.2%+8.2 pts

04Union County, NJNJ601,863+7.2%+1.4 pts

05Somerset County, NJNJ356,486+6.8%−17.0 pts

06Middlesex County, NJNJ883,335+6.6%−5.1 pts

07Mercer County, NJNJ399,289+5.7%−2.0 pts

08Bergen County, NJNJ977,026+5.6%−1.5 pts

09Gloucester County, NJNJ312,638+4.9%−5.8 pts

10Passaic County, NJNJ531,624+4.6%−3.4 pts

11Morris County, NJNJ524,251+3.5%−8.1 pts

12Burlington County, NJNJ481,439+2.9%−4.2 pts

13Monmouth County, NJNJ651,035+2.1%−9.1 pts

14Camden County, NJNJ535,799+1.9%+0.7 pts

15Warren County, NJNJ112,953+0.9%−11.0 pts

16Hunterdon County, NJNJ131,781+0.5%−12.7 pts

17Atlantic County, NJNJ278,657-0.0%−12.6 pts

18Cumberland County, NJNJ157,148-1.8%−7.8 pts

19Salem County, NJNJ66,280-1.9%−0.3 pts

20Cape May County, NJNJ93,390-2.1%−9.7 pts

21Sussex County, NJNJ148,063-3.4%−13.5 pts

SHOWING 1–21 OF 21

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UPDATED 2026-08-08 · DATA: US CENSUS BUREAU DECENNIAL CENSUS