The Soviet Navy (Russian: Военно-морской флот СССР (ВМФ), tr. Voyenno-morskoy flot SSSR (VMF), lit. 'Military Maritime Fleet of the USSR') was the naval warfare uniform service branch of the Soviet Armed Forces. Often referred to as the Red Fleet (Russian: Красный флот, tr. Krasnyy flot), the Soviet Navy made up a large part of the Soviet Union's strategic planning in the event of a conflict with the opposing superpower, the United States, during the Cold War (1945–1991). The Soviet Navy played a large role during the Cold War, either confronting the North Atlantic Treaty Organization in western Europe or power projection to maintain its sphere of influence in eastern Europe.

The Soviet Navy was divided into four major fleets: the Northern, Pacific, Black Sea, and Baltic Fleets, in addition to the Leningrad Naval Base, which was commanded separately. It also had a smaller force, the Caspian Flotilla, which operated in the Caspian Sea and was followed by a larger fleet, the 5th Squadron, in the Mediterranean Sea. The Soviet Navy included Naval Aviation, Naval Infantry, and the Coastal Artillery.

The Soviet Navy was formed from the remnants of the Imperial Russian Navy during the Russian Civil War. After the dissolution of the Soviet Union in 1991, the Russian Federation inherited the largest part of the Soviet Navy and reformed it into the Russian Navy, with smaller parts becoming the basis for navies of the newly independent post-Soviet states.