RANKING · 2025 ESTIMATES · 21 SHOWN OF 21

Most population gained, New Jersey counties

New Jersey counties that added the most residents from the 2020 census to 2025, by raw count of people rather than percentage. 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

YEAR2000 2010 2020 2025

RANKPLACESTATEPOPPOPULATION CHANGEVS 2000

01Ocean County, NJNJ673,746+36,517−53%

02Essex County, NJNJ896,379+32,651+112%

03Union County, NJNJ601,863+26,518−8%

04Bergen County, NJNJ977,026+21,294−64%

05Middlesex County, NJNJ883,335+20,173−74%

06Burlington County, NJNJ481,439+19,579−31%

07Morris County, NJNJ524,251+14,966−69%

08Camden County, NJNJ535,799+12,314+102%

09Mercer County, NJNJ399,289+11,949−52%

10Somerset County, NJNJ356,486+11,125−81%

11Gloucester County, NJNJ312,638+10,344−58%

12Hudson County, NJNJ735,033+10,179−82%

13Passaic County, NJNJ531,624+7,506−79%

14Monmouth County, NJNJ651,035+7,420−88%

15Atlantic County, NJNJ278,657+4,123−85%

16Sussex County, NJNJ148,063+3,842−71%

17Warren County, NJNJ112,953+3,321−69%

18Cumberland County, NJNJ157,148+2,996−64%

19Hunterdon County, NJNJ131,781+2,834−80%

20Salem County, NJNJ66,280+1,443−243%

21Cape May County, NJNJ93,390-1,873−126%

SHOWING 1–21 OF 21

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