SWU is a three-letter acronym that can mean several things:
Science & technology
- Separative Work Unit, the amount of separation done by an enrichment process
- System Wide Upgrade
Unions
- Seychelles Workers Union
- Slovenian Women's Union
- Starbucks Workers Union
Universities
- Southwest University (Chongqing China)
- Srinakharinwirot University (Bangkok, Thailand)
- Seoul Women's University
- Showa Women's University (Tokyo, Japan)
- Southern Wesleyan University
- Southwestern University (Texas, USA)
- Southwestern University (Philippines)
Miscellaneous
- StandWithUs
- Star Wars universe
- South West Underground
- SWU Music & Arts, Brazilian music festival
- ICAO airline designator for Swiss European Air Lines