FSU
FSU is the abbreviation for:
- Free social union, free economy oriented political party, see Human Economy Party
- Former Soviet Union, the former Soviet Union
- Fédération syndicale unitaire , the largest French union of the teaching and public services
- Fédération suisse des urbanistes (also Federazione svizzera degli urbanisti and Federaziun svizra d'urbanists ), specialist association for planning within the Swiss Association of Engineers and Architects, see Association of Swiss Planners
- Friends Stand United , American street gang from Boston, Massachusetts
- Floating Storage Unit, ship used as a storage station in offshore oil production, see Floating Production Storage and Offloading Unit
- Powiat Sulęciński in the Lubusz Voivodeship, Poland (license plate)
Educational institutions:
- Friedrich Schiller University Jena , university in Thuringia
- Florida State University , American college based in Tallahassee
- Ferris State University , American college in the state of Michigan
- Free school Untertaunus , comprehensive school in Aarbergen-Kettenbach in Hesse