Steelton is a borough in Dauphin County, Pennsylvania, United States, 4 miles (6 km) southeast of Harrisburg.

The land was purchased from owners Henry A. and Rudolph F. Kelker; then, steel pioneer Alexander Lyman Holley was chosen to build the mill along the Susquehanna River, which was completed by 1867 (along with a mansion for Felton), and began operation on May 15, 1868.

19 people were killed and 199 injured, when a Baseball Special train from Harrisburg to Philadelphia derailed at Steelton on July 28, 1962.

It is bordered to the southeast by the borough of Highspire and to the northeast by the unincorporated communities of Enhaut and Bressler.

According to the United States Census Bureau, the borough has a total area of 1.9 square miles (4.9 km2), all land.

[7] Pennsylvania Route 230 (Front Street) is the main road through the borough, connecting Harrisburg to the northwest with Highspire and Middletown to the southeast.

Front Street in Steelton has long been the town's social center, with shops, banks, churches, restaurants and bars.

[13] In September 2017, the borough opened the first skatepark in Dauphin County, which was extended again in 2020 to a total of 28,000 square feet.

The Steelton High School building was added to the National Register of Historic Places in 2011.