Frenchtown is a borough in Hunterdon County, New Jersey, United States. Frenchtown is located along the banks of the Delaware River on the Hunterdon Plateau thirty two miles northwest of the state capital Trenton. As of the 2010 United States Census, the borough's population was 1,373, reflecting a decline of 115 (-7.7%) from the 1,488 counted in the 2000 Census, which had in turn declined by 40 (-2.6%) from the 1,528 counted in the 1990 Census.
Various names have been applied to this settlement after the many ferry operators residing on both sides of the river. The community had variously been known as Alexandriaville, Sunbeam and Frenchtown over the years. The Borough was formed by an Incorporation act of the New Jersey Legislature on April 4, 1867, from portions of Alexandria Township. Additional territory was acquired from Kingwood Township in 1876.
The first bridge across the Delaware at Frenchtown was a six-span covered wooden bridge built in 1841 on the five piers that still stand today, and the community became a gateway to Pennsylvania. The present day steel truss Uhlerstown-Frenchtown Bridge is a free Delaware River Joint Toll Bridge Commission bridge over the Delaware River connecting Frenchtown to Uhlerstown, Bucks County, Pennsylvania.
The Lenape Native Americans had populated the area until they were fully supplanted by European settlement around 1750. About 1725, a group of French Huguenot refugees settled in Hunterdon County. Originally from the Picardy region of France, they had fled after the revocation of the Edict of Nantes in 1685 when the King began persecution of non Catholics in France. One notable settler was Luther Calvin, a landowner and ferry operator who also bought a Hotel on Everittstown Road.