Harrisburg is the capital city of the Commonwealth of Pennsylvania, United States, and the seat of Dauphin County. With a population of 50,135 as of 2021, Harrisburg is the ninth-most populous city in Pennsylvania.
Middletown is a borough in Dauphin County, Pennsylvania, on the Susquehanna River, 10 miles (16 km) southeast of Harrisburg. As of the 2020 census, it had a population of 9,550. It is part of the Harrisburg–Carlisle Metropolitan Statistical Area.