Town guide
Frelinghuysen
New Jersey · NJ · Warren County
About Frelinghuysen
Township in Warren County, New Jersey, US1848Established
2,199Population
23.6 sq miArea
689 ftElevation
Frelinghuysen Township ( FREE-ling-hy-zən) is a township in Warren County, in the U.S. state of New Jersey. As of the 2020 United States census, the township's population was 2,199, a decrease of 31 (−1.4%) from the 2010 census count of 2,230, which in turn reflected an increase of 147 (+7.1%) from the 2,083 counted in the 2000 census.
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