RANKING · 2025 ESTIMATES · 21 SHOWN OF 21

Largest by population, New Jersey counties

The most populous New Jersey counties as of the 2025 population estimates. This list covers the 21 counties in New Jersey that qualify, ranked against each other statewide. The median across all 21 is 481,439.

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SAME RANKING BYCities States Metros ZIP codes

YEAR1990 2000 2010 2020 2025

RANKPLACESTATETOTAL POPULATIONVS 2000

01Bergen County, NJNJ977,026+11%

02Essex County, NJNJ896,379+13%

03Middlesex County, NJNJ883,335+18%

04Hudson County, NJNJ735,033+21%

05▲1Ocean County, NJNJ673,746+32%

06▼1Monmouth County, NJNJ651,035+6%

07Union County, NJNJ601,863+15%

08▲1Camden County, NJNJ535,799+5%

09▼1Passaic County, NJNJ531,624+9%

10Morris County, NJNJ524,251+11%

11Burlington County, NJNJ481,439+14%

12Mercer County, NJNJ399,289+14%

13Somerset County, NJNJ356,486+20%

14Gloucester County, NJNJ312,638+23%

15Atlantic County, NJNJ278,657+10%

16Cumberland County, NJNJ157,148+7%

17Sussex County, NJNJ148,063+3%

18Hunterdon County, NJNJ131,781+8%

19Warren County, NJNJ112,953+10%

20Cape May County, NJNJ93,390−9%

21Salem County, NJNJ66,280+3%

SHOWING 1–21 OF 21

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