With the war over, "Massachusetts" voyaged to the Puget Sound Navy Yard once more for an overhaul; once completed, she left on 28 January 1946 and operated off the California coast before setting course for Hampton Roads via the Panama Canal. After she arrived on 22 April, "Massachusetts" was decommissioned on 27 March 1947 and entered the Atlantic Reserve Fleet; she was struck from the Naval Register on 1 June 1962, but not scrapped. Instead, the battleship was given to the Massachusetts Memorial Committee on 8 June 1965 to become a museum ship in Fall River, Massachusetts; she has been located in "Battleship Cove" ever since.