Steelton is a borough in Dauphin County, Pennsylvania, three miles southeast of Harrisburg. In 1900, 12,086 people lived here; in 1910, 14,246 people lived here; in 1920, 13,248 people lived here; and in 1940, 13,115 people lived here. The population was 5,858 at the 2000 census. Steelton apartments for rent comparison page shows most up to date rent information on Steelton apartments and houses. Rent information is obtained from multiple rental sources but we cannot guarantee their accuracy.