Kittery is a town in York County, Maine, United States. The population was 9,543 at the 2000 census. The town declares itself to be the "Gateway to Maine. " Home to the Portsmouth Naval Shipyard on Seavey's Island, Kittery includes Badger's Island, the seaside district of Kittery Point, and part of the Isles of Shoals. It is also a popular tourist destination known for its many outlet stores. Kittery is part of the Portland–South Portland–Biddeford, Maine Metropolitan Statistical Area.