USS Plunger (SS-179) was a submarine of the United States Navy. On 4 June 1942, during the Battle of Midway, she was stationed in the waters between Midway and Hawaii. Her assignment there was as a backstop. She was not in the carrier fight.
Plunger survived the war. She was decommissioned on 15 November 1945. Her name was struck on 6 July 1956.
