Northfork is a town in McDowell County, West Virginia, United States, located on U.S. Route 52 between Welch and Bluefield. The population was 231 at the 2020 census. Northfork was incorporated in 1901, so named because of its location on the north fork of the Elkhorn Creek at its junction with the south fork. It was consolidated with the town of Clark on March 26, 1948.