The Frelinghuysen family is an American family known for its significant contributions to politics and public service, particularly in the state of New Jersey. The family's roots trace back to the 17th century, with John Frelinghuysen being one of the early notable members, serving as a minister and a leader in the Dutch Reformed Church. Several members of the Frelinghuysen family have held prominent political positions, including Frelinghuysen Township and the U.S. Congress. Henry Frelinghuysen served as a U.S. Senator in the 19th century, further establishing the family's legacy in American history.