Learn about the 21 counties in the U.S. state of New Jersey, their FIPS codes, county seats, largest cities, population, area, and history. See a map and a table with detailed information for each county.

There are 21 counties in the U.S. state of New Jersey. These counties together contain 564 municipalities, or administrative entities composed of clearly defined territory; 252 boroughs, 52 cities, 15 towns, 241 townships, and 4 villages. [1]

Find county names, borders and labels on an interactive map of New Jersey. Search by address, GPS coordinates, or use your current location to see the county information.

New Jersey County Map Showing county seats, present boundaries and dates of formation

Find information and data about the 21 counties in New Jersey, including their subdivisions, population, income, weather, and more. Explore the physical, cultural, and historical features of each county and its cities, towns, and neighborhoods.

A map of New Jersey Counties with County seats and a satellite image of New Jersey with County outlines.

Explore the 21 counties of New Jersey with this color-coded map that shows their borders, major cities, population, and economic data. Learn about the history, culture, and attractions of each county, from the urban energy of Hudson County to the agricultural roots of Warren County.

609-989-6518. County Exec - Dan Benson. Middlesex County. Administration Building. 75 Bayard Street. New Brunswick, NJ 08901. 732-745-3000. Commissioner Director - Ronald G. Rios. Monmouth County.

Find out the names, populations and locations of the 21 counties in New Jersey. See an interactive map and a complete list of all counties in New Jersey with links to related maps and data.