This article is about the U.S. state. For other meanings, see Pennsylvania (disambiguation).

Pennsylvania (English pronunciation [Zum Anhören bitte klicken!Abspielenˌpɛnsɪlˈveɪ̯nɪə̯]) is a state founded by William Penn in the eastern United States of America and one of its thirteen founding states. Its official name is Commonwealth of Pennsylvania ("Commonwealth of Pennsylvania"). Together with New York and New Jersey, Pennsylvania is classified as a Mid-Atlantic state.

The name literally means "woodland of Penn" (from Latin silva "forest"). Pennsylvania is nicknamed the Keystone State, after the central wedge-shaped stone in the middle of an arch).