Hover/click a county for data.

Population of Counties in New Jersey (2024)

Download Table Data

Enter your email below, and you'll receive this table's data in your inbox momentarily.

2024 Population
Growth Since 2020
Area (mi²)
Density (/mi²)
Bergen County961,9320.86%2334,128Bergen County location
Middlesex County866,1520.55%3092,803Middlesex County location
Essex County852,510-0.87%1266,766Essex County location
Hudson County708,563-1.84%4615,404Hudson County location
Ocean County662,7313.8%6281,055Ocean County location
Monmouth County641,370-0.23%4681,370Monmouth County location
Union County575,0350.24%1035,583Union County location
Camden County529,7431.27%2212,397Camden County location
Morris County517,6271.81%4611,123Morris County location
Passaic County513,156-1.96%1862,759Passaic County location
Burlington County472,2332.29%799591Burlington County location
Mercer County382,563-1.01%2241,708Mercer County location
Somerset County350,6371.71%3021,161Somerset County location
Gloucester County310,0792.48%322963Gloucester County location
Atlantic County275,0440.31%556495Atlantic County location
Cumberland County153,305-0.27%483317Cumberland County location
Sussex County146,6891.93%518283Sussex County location
Hunterdon County130,5611.38%428305Hunterdon County location
Warren County111,6011.9%357313Warren County location
Cape May County93,815-1.29%252372Cape May County location
Salem County65,5191.05%332197Salem County location

There are 21 counties in New Jersey. In 2019, Bergen County is New Jersey's most populous county with 936,692 residents. The county has no large cities and has grown by 3.35% since the 2010 census. New Jersey has nine counties with more than 500,000 residents. Other large counties in New Jersey include Middlesex County (829,685), Essex County (799,767) home to the city of Newark, Hudson County (676,061), Monmouth County (621,354), and Ocean County (601,651). Of these counties, only Monmouth County experienced a decline in population. The most rapid growth occurred in Hudson County, which grew by 6.36% since the census.

New Jersey Counties with Fewest Residents

New Jersey has only two counties below 100,000 residents. The least populous county in New Jersey is Salem County with 62,607 residents, a decline of 5.11% from the census. The next-smallest county is Cape May County with 92,560 residents with a population growth of -4.79%. Of the 12 New Jersey counties with a population below 500,000, all but four experienced a decline in population.

New Jersey Counties with Rapid Growth

Hudson County, New Jersey experienced the most rapid growth in the state, climbing to 676,061 in 2019 and up 6.36% from the census. Other counties that have reported rapid growth in New Jersey include Ocean County (4.17%), Union County (3.83%), and Bergen County (3.35%).

Population of Counties in New Jersey (2024)

Lists of Counties in all States

  1. New Jersey State Data Center
  2. US Census State Population Estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  3. US Census County Population Estimates - Most recent county estimates from the Census Bureau's Population Estimates Program
  4. American Community Survey (2009 - 2013)
  5. Census QuickFacts
  6. Historical Populations of States and Counties (1790 - 1990)