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. The median across all 21 is +2.4%. Biggest climber in the top 100 since 2020: Sussex County, NJ, up 11 places to #10.

Flip the list · Fastest shrinking, US counties →

New JerseyAll states All rankings

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

01▲1Ocean County, NJNJ673,746+5.7%−12.2 pts

02▲2Union County, NJNJ601,863+4.6%−1.2 pts

03▲9Burlington County, NJNJ481,439+4.2%−2.9 pts

04▼1Essex County, NJNJ896,379+3.8%+1.8 pts

05▲4Gloucester County, NJNJ312,638+3.4%−7.3 pts

06▼1Somerset County, NJNJ356,486+3.2%−20.6 pts

07Mercer County, NJNJ399,289+3.1%−4.6 pts

08▲7Warren County, NJNJ112,953+3.0%−8.8 pts

09▲2Morris County, NJNJ524,251+2.9%−8.7 pts

10▲11Sussex County, NJNJ148,063+2.7%−7.4 pts

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

12▼6Middlesex County, NJNJ883,335+2.3%−9.3 pts

13▼5Bergen County, NJNJ977,026+2.2%−4.9 pts

14▲5Salem County, NJNJ66,280+2.2%+3.8 pts

15▲1Hunterdon County, NJNJ131,781+2.2%−11.0 pts

16▲2Cumberland County, NJNJ157,148+1.9%−4.1 pts

17Atlantic County, NJNJ278,657+1.5%−11.1 pts

18▼8Passaic County, NJNJ531,624+1.4%−6.5 pts

19▼18Hudson County, NJNJ735,033+1.4%−8.7 pts

20▼7Monmouth County, NJNJ651,035+1.2%−10.1 pts

21▼1Cape May County, NJNJ93,390-2.0%−9.6 pts

SHOWING 1–21 OF 21

Download CSV (full list, 21 rows)

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