USS Montana (BB-67) was a designed, but never built, American battleship of the Second World War. It was assumed that the total length of the ship would be 280.9 meters and a width of 37 meters. Full displacement would be up to about 71,000 tons, and maximum speed - up to about 28-29 knots. The on-board armament would consist of: 12 406 mm guns placed in four turrets of three guns, 20 127 mm guns or 56 20 mm AA guns. Probably the unit could use up to three seaplanes. USS Montana (BB-67) was to be the leading unit of the battleship class of the same name. This type of battleships was to be completed by the Iowa type units. Compared to their predecessors, the Montana-class ships would be much better armed and armored, but would have a slower maximum speed. Taking into account the design assumptions, the Montana-class battleships would undoubtedly be the most powerful ships of this type in the US Navy and one of the most powerful in the world. Their only real opponent could be the Japanese Yamato-class battleships. The construction of the USS Montana (BB-67) was approved in July 1940 as part of the US Navy's expansion plan called "Two Ocean Navy". The construction was to be carried out at the Philadephia Navy Yard in Pennsylvania. However, in the light of the experience of the battles in the Coral Sea and Midway, the American admiralty opted for the development of aircraft carriers, and in July 1943 the construction of the USS Montana was canceled. Thus, the ship was never launched.