USS Montana (BB-51) was a
South Dakota-class battleship, the
second United States Navy ship to be named in honor of
the 41st state. Her keel was laid down
on 1 September 1920 by the Mare Island Navy Yard.
Her construction was suspended on 8 February 1922
at 27.6 percent complete, and canceled 17 August 1923
in accordance with the provisions of the Washington Naval Treaty.
She was struck from the Naval Vessel Register on 24 August 1923
and sold on 25 October 1923 to be scrapped.