The State Correctional Institution – Graterford, commonly referred to as SCI Graterford, known prior as Eastern Correctional Institution, Graterford Prison, Graterford Penitentiary, and the Graterford Prison Farm, was a Pennsylvania Department of Corrections prison located in Skippack Township, Montgomery County, Pennsylvania, near Graterford. The prison, located on Graterford Road off of Pennsylvania Route 29, was about 31 miles (50 km) northwest of Philadelphia.