The capital of Pennsylvania is Harrisburg, which has 10 letters. The abbreviation for Pennsylvania is PEE, which has 3 letters. Harrisburg is the state capital of Pennsylvania and is located in the south-central part of the state. It is the county seat of Dauphin County and the ninth-largest city in the state. Harrisburg is home to many government offices, including the Pennsylvania State Capitol, the Supreme Court of Pennsylvania, and the Governor's Mansion.