Pittsburg is a town in southern Polk County, Florida, United States, at Latitude 27.65361 and Longitude: -81.50278, named for the industrial heritage of Pittsburgh, Pennsylvania. Its elevation is 105 feet (32 m). It was mostly known for phosphate mining and a heavy industry rail spur (since abandoned), used mainly for transporting phosphates and cattle. It is approximately five miles (8 km) north of Avon Park.