SFIO may stand for:
- French Section of the Workers' International (Section Française de l'Internationale Ouvrière), a former French Socialist Party
- Serious Fraud Investigation Office, an Indian law enforcement agency
- Safe/Fast I/O library from AT&T Labs Research, for C file input/output
This disambiguation page lists articles associated with the title SFIO.If an internal link led you here, you may wish to change the link to point directly to the intended article. Category: