Warren County is a county located in the U.S. state of New Jersey and is part of the New York metropolitan area. As of the 2000 Census, the population was 102,437. Its county seat is Belvidere. Warren County was incorporated by an Act of the New Jersey Legislature on November 20, 1824, from portions of Sussex County. At its creation, the county consisted of the townships of Greenwich, Independence, Knowlton, Mansfield, Oxford, Pahaquarry (now defunct). Warren County is generally considered the eastern border of the Lehigh Valley.
Municipalities
Allamuchy Township
Allamuchy-Panther Valley
Alpha
Belvidere
Blairstown Township
Franklin Township
Frelinghuysen Township
Greenwich Township
Hackettstown
Hardwick Township
Harmony Township
Hope Township
Independence Township
Great Meadows-Vienna
Knowlton Township
Liberty Township
Lopatcong Township
Mansfield Township
Beattystown
Oxford Township
Oxford
Phillipsburg
Pohatcong Township
Washington Township
Brass Castle
Washington
White Township
