SFSR may refer to:
- A Soviet Federative Socialist Republic or Socialist Federative Soviet Republic, any of several Republics of the Soviet Union:
- Russian Soviet Federative Socialist Republic (Russian SFSR) (1917–1991)
- Transcaucasian Socialist Federative Soviet Republic (Transcaucasian SFSR) (1922–1936)
- Santa Fe Southern Railway, a short line railroad in New Mexico, United States
- San Francisco Syncope Rule, a clinical prediction rule for syncopal episodes
This disambiguation page lists articles associated with the title SFSR.
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