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. The median across all 21 is +10,344. Biggest climber in the top 100 since 2020: Burlington County, NJ, up 7 places to #6.

Flip the list · Most population lost, US counties →

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SAME RANKING BYCities States Metros

RELATEDLargest by population Fastest growing Fastest shrinking Most population lost Most densely populated Most sparsely populated

YEAR2000 2010 2020 2025

RANKPLACESTATEPOPPOPULATION CHANGEVS 2000

01▲2Ocean County, NJNJ673,746+36,517−53%

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

03▲3Union County, NJNJ601,863+26,518−8%

04▲1Bergen County, NJNJ977,026+21,294−64%

05▼1Middlesex County, NJNJ883,335+20,173−74%

06▲7Burlington County, NJNJ481,439+19,579−31%

07▲3Morris County, NJNJ524,251+14,966−69%

08▲6Camden County, NJNJ535,799+12,314+102%

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

10▼2Somerset County, NJNJ356,486+11,125−81%

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

12▼11Hudson County, NJNJ735,033+10,179−82%

13▼6Passaic County, NJNJ531,624+7,506−79%

14▼2Monmouth County, NJNJ651,035+7,420−88%

15▲2Atlantic County, NJNJ278,657+4,123−85%

16▲5Sussex County, NJNJ148,063+3,842−71%

17▼2Warren County, NJNJ112,953+3,321−69%

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

19▼3Hunterdon County, NJNJ131,781+2,834−80%

20▼2Salem County, NJNJ66,280+1,443−243%

21▼2Cape May County, NJNJ93,390-1,873−126%

SHOWING 1–21 OF 21

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