List of All Counties in New Jersey

There are a total of 21 counties in the state of New Jersey. Among them, Bergen County is the oldest one (established in 1683) while Union County is the youngest (established in 1857).  With population of 905,116, Bergen County is the most populated. The biggest county by land area is Burlington County (2,085 km²) and the smallest is Hudson County (122 km²). Below please see all New Jersey counties which are listed in alphabetical order.

Map of New Jersey Counties

Map of New Jersey Counties