Harrisburg is the capital of the Commonwealth of Pennsylvania, a state of the United States of America. As of the 2000 census, the city had a population of 48,950. The Harrisburg area population was 643,820, making it the fifth most populous metropolitan area in Pennsylvania, after Philadelphia, Pittsburgh, Allentown and Scranton. Harrisburg is the county seat of Dauphin County and lies on the east bank of the Susquehanna River, 105 miles west-northwest of Philadelphia. Harrisburg apartments for rent comparison page shows most up to date rent information on Harrisburg apartments and houses. Rent information is obtained from multiple rental sources but we cannot guarantee their accuracy.