RANKING · 2025 ESTIMATES · 21 SHOWN OF 21

Most population lost, New Jersey counties

New Jersey counties that lost 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

01Cape May County, NJNJ93,390-1,873−126%

02Salem County, NJNJ66,280+1,443−243%

03Hunterdon County, NJNJ131,781+2,834−80%

04Cumberland County, NJNJ157,148+2,996−64%

05Warren County, NJNJ112,953+3,321−69%

06Sussex County, NJNJ148,063+3,842−71%

07Atlantic County, NJNJ278,657+4,123−85%

08Monmouth County, NJNJ651,035+7,420−88%

09Passaic County, NJNJ531,624+7,506−79%

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

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

12Somerset County, NJNJ356,486+11,125−81%

13Mercer County, NJNJ399,289+11,949−52%

14Camden County, NJNJ535,799+12,314+102%

15Morris County, NJNJ524,251+14,966−69%

16Burlington County, NJNJ481,439+19,579−31%

17Middlesex County, NJNJ883,335+20,173−74%

18Bergen County, NJNJ977,026+21,294−64%

19Union County, NJNJ601,863+26,518−8%

20Essex County, NJNJ896,379+32,651+112%

21Ocean County, NJNJ673,746+36,517−53%

SHOWING 1–21 OF 21

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