USSR may refer to:

• The Union of Soviet Socialist Republics
• The Union of Soviet Sovereign Republics, a proposed replacement state for the Union of Soviet Socialist Republics
• Uninterrupted sustained silent reading
• USSR, a Soviet-published magazine distributed in the United States

This disambiguation page lists articles associated with the same title. If an internal link led you here, you may wish to change the link to point directly to the intended article.