USS Montana may refer to:
, was a that provided convoy escort duty during World War I, and was eventually renamed and reclassified Missoula (CA-13)
, was a cargo ship during World War I and sunk by torpedo in August 1918
, was a South Dakota-class battleship

South Dakota class battleship (1920)

The first South Dakota class was a class of six battleships, laid down in 1920 but never completed. These battleships would have been the last dreadnoughts to be commissioned, if the Washington Naval Treaty not caused their cancellation one-third of the way through their construction, they would...

 laid down in 1920 but canceled and scrapped in 1923
, would have been the lead ship

Lead ship

The lead ship or class leader is the first of a series or class of ships all constructed according to the same general design. The term is applicable military ships and larger civilian craft.-Overview:...

of the however, the entire class was canceled in 1943