The Philadelphia State Hospital at Byberry was a psychiatric hospital located on either side of Roosevelt Boulevard, US Route 1, in Northeast Philadelphia, Pennsylvania. It was located in the Somerton section of the city on the border with Bucks County. The name of the institution was changed several times during its history, being variously named Philadelphia State Hospital, Byberry State Hospital, Byberry City Farms, and the Philadelphia Hospital for Mental Diseases. It was home to people ranging from the mentally challenged to the criminally insane.