Coraopolis is a borough in Allegheny County, Pennsylvania, United States, along the Ohio River. The population was 5,559 at the 2020 census. It is a suburb of the Pittsburgh metropolitan area. Coraopolis is located west of Pittsburgh along the Ohio River and to the east of the Pittsburgh International Airport. The borough has steep topography, numerous brick streets and many large, old houses. Dick's Sporting Goods is headquartered in Coraopolis, as is the American Bridge Company.