Fastest Growing Counties in New Jersey (2025)

County
Rank
Change (2020)
2025 Pop.
2020 Pop.
Ocean County14.35%666,265638,465
Gloucester County23.03%311,735302,563
Burlington County32.95%475,299461,682
Morris County42.44%520,831508,439
Sussex County52.31%147,246143,915
Somerset County62.23%352,432344,754
Warren County72.22%111,950109,520
Camden County81.75%532,290523,122
Hunterdon County91.67%130,939128,786
Salem County101.32%65,70064,841
Bergen County111.3%966,128953,690
Middlesex County120.84%868,681861,408
Union County130.64%577,344573,660
Cumberland County140.37%154,284153,719
Atlantic County150.25%274,875274,190
Monmouth County16-0.45%639,941642,836
Essex County17-0.71%853,903859,974
Mercer County18-0.78%383,455386,466
Hudson County19-1.42%711,654721,879
Passaic County20-2.01%512,917523,439
Cape May County21-2.13%93,02095,044

New Jersey County Growth Overview

New Jersey's counties show varied growth patterns from 2020 to 2025. Ocean County leads with 4.35% annualized growth, followed by Gloucester County (3.03%) and Burlington County (2.95%). The largest counties are Bergen County (966,128), Middlesex County (868,681), and Essex County (853,903). Of the 21 counties in New Jersey, 15 are growing while 6 have experienced population decline. Overall, counties averaged 0.96% annualized growth, with total population growing by 0.85% annually.