Rockhill or Rockhill Furnace is a borough in Huntingdon County, Pennsylvania, United States. The population was 371 at the 2010 census, down from 414 at the 2000 census. It is the site of the East Broad Top Railroad and the Rockhill Trolley Museum. Although the community was long known as "Rockhill Furnace", its name has always officially been "Rockhill".