RANKING · 2010 CENSUS · 21 SHOWN OF 21

Most population lost, New Jersey counties · 2010

New Jersey counties that lost the most residents from the 2000 census to 2010, 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

01Essex County, NJNJ896,379-9,664−163%

02Cape May County, NJNJ93,390-5,061−170%

03Salem County, NJNJ66,280+1,798−278%

04Camden County, NJNJ535,799+4,725−23%

05Sussex County, NJNJ148,063+5,099−61%

06Warren County, NJNJ112,953+6,255−42%

07Hunterdon County, NJNJ131,781+6,360−55%

08Cumberland County, NJNJ157,148+10,460+25%

09Passaic County, NJNJ531,624+12,177−66%

10Union County, NJNJ601,863+13,958−51%

11Monmouth County, NJNJ651,035+15,079−76%

12Mercer County, NJNJ399,289+15,752−37%

13Bergen County, NJNJ977,026+20,998−64%

14Atlantic County, NJNJ278,657+21,997−22%

15Morris County, NJNJ524,251+22,064−55%

16Hudson County, NJNJ735,033+25,291−55%

17Burlington County, NJNJ481,439+25,340−11%

18Somerset County, NJNJ356,486+25,954−55%

19Gloucester County, NJNJ312,638+33,615+37%

20Middlesex County, NJNJ883,335+59,696−24%

21Ocean County, NJNJ673,746+65,651−16%

SHOWING 1–21 OF 21

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UPDATED 2026-07-15 · DATA: US CENSUS BUREAU DECENNIAL CENSUS