Ashley is a borough in Luzerne County, Pennsylvania, one mile (2 km) from Wilkes Barre. It was a productive coal-mining area at the start of the twentieth century. Population in 1900, 4,046; in 1910, 5,601; and in 1940, 6,371. The population was 2,790 at the 2010 census. Film actor Russell Johnson, best known as "The Professor" on the CBS television sitcom Gilligan's Island, was born here. 1900 Olympic champion Walter Tewksbury was also born here.