USSR most often refers to the Soviet Union.
USSR may also refer to:
Union of Soviet Sovereign Republics, a proposed replacement state for the Union of Soviet Socialist Republics The USSR, a former Soviet magazine distributed in the United States; its modern successor is Russian Life "U.S.S.R." (song), a song by Eddy Huntington, recorded in 1986 "U.S.S.R.", a bonus track from a reissue of Siamese Dream by Smashing Pumpkins
See also CCCP (disambiguation) SSSR (disambiguation) Soviet Union (disambiguation), including Sovetsky Soyuz Ukrainian Soviet Socialist Republic, normally abbreviated as UkrSSR Uzbek Soviet Socialist Republic, normally abbreviated as UzSSR