Charlestown is an unincorporated community located within Bethlehem Township, in Hunterdon County, in the U.S. state of New Jersey, off County Route 635, southwest of Hampton.N 40.68917 W 74.97250, ACME Mapper. Accessed January 1, 2015.Locality Search, State of New Jersey. Accessed January 1, 2015.
History By 1881, Charlestown had a school, wheelwright shop, blacksmith and about twelve dwellings.
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