USS Idaho (BB-42), a New Mexico-class battleship, was the fourth ship of the United States Navy to be named for the 43rd state. Her keel was laid down by the New York Shipbuilding Corporation of Camden, New Jersey. She was launched on 30 June 1917 sponsored by Miss Henrietta Amelia Simons, granddaughter of Idaho Governor Moses Alexander; and commissioned on 24 March 1919, Captain Carl Theodore Vogelgesang in command.