RANKING · 1990 CENSUS · 21 SHOWN OF 21

Most sparsely populated, New Jersey counties · 1990

New Jersey counties with the fewest residents per square mile (2023). This list covers the 21 counties in New Jersey that qualify, ranked against each other statewide.

Flip the list · Most densely populated, US counties →

New JerseyAll states All rankings

SAME RANKING BYCities States Metros

RELATEDLargest by population Fastest growing Fastest shrinking Most densely populated Best broadband access Worst broadband access

YEAR1990 2000 2010 2020 2025

RANKPLACESTATEPOPPOPULATION DENSITYVS 2000

01Salem County, NJNJ66,280197+2%

02Hunterdon County, NJNJ131,781252−12%

03Sussex County, NJNJ148,063253−9%

04Warren County, NJNJ112,953257−11%

05Cumberland County, NJNJ157,148286−6%

06Cape May County, NJNJ93,390378−7%

07Atlantic County, NJNJ278,657404−11%

08Burlington County, NJNJ481,439494−7%

09Ocean County, NJNJ673,746689−15%

10Gloucester County, NJNJ312,638715−10%

11Somerset County, NJNJ356,486796−19%

12Morris County, NJNJ524,251914−10%

13Monmouth County, NJNJ651,0351,181−10%

14Mercer County, NJNJ399,2891,451−7%

15Middlesex County, NJNJ883,3352,172−10%

16Camden County, NJNJ535,7992,272−1%

17Passaic County, NJNJ531,6242,434−7%

18Bergen County, NJNJ977,0263,546−7%

19Union County, NJNJ601,8634,805−5%

20Essex County, NJNJ896,3796,172−2%

21Hudson County, NJNJ735,03311,973−9%

SHOWING 1–21 OF 21

Download CSV (full list, 21 rows)

UPDATED 2026-06-02 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES