Steelton is a borough in Dauphin County, Pennsylvania, three miles (5km) southeast of Harrisburg. The population was 5,858 at the 2000 census. The borough is part of the HarrisburgCarlisleMetropolitan Statistical Area. Steelton was incorporated as a borough on January 19, 1880. The extensive works of the Pennsylvania Steel Company, later operated by Bethlehem Steel, are located along the Susquehanna River in Steelton. Also present at one time were brickyards, a flouring mill, and machine shops.