Hartley is a historical village in the Central Tablelands region of New South Wales, Australia, within the City of Lithgow local government area, located approximately 127 kilometres (79 mi) west of the Sydney central business district. Hartley is located below the western escarpment of the Blue Mountains.
It was once a major administrative centre on the Great Western Highway. It has since fallen into decline, replaced by other towns that are on the railway line. At the 2011 census, Hartley had a population of 299 people.