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. It was mostly known for phosphate mining and a heavy industry rail spur, used mainly for transporting phosphates and cattle. It is approximately five miles n…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. It was mostly known for phosphate mining and a heavy industry rail spur, used mainly for transporting phosphates and cattle. It is approximately five miles north of Avon Park.