Portsmouth Naval Prison

Portsmouth Naval Prison
The former prison as seen in 2013
Portsmouth Naval Prison is located in Maine
Portsmouth Naval Prison
Portsmouth Naval Prison is located in the United States
Portsmouth Naval Prison
LocationKittery, Maine
Coordinates43°04′34″N 70°43′52″W / 43.0761°N 70.7311°W / 43.0761; -70.7311
StatusClosed
Opened1908
Closed1974

Portsmouth Naval Prison is a former U.S. Navy and Marine Corps prison on the grounds of the Portsmouth Naval Shipyard (PNS) in Kittery, Maine. The building has the appearance of a castle. The reinforced concrete naval prison was occupied from 1908 until 1974.