WSF can refer to:
- Washington State Ferries
- We Start Fires
- Werribee Sewage Farm
- Windows Script File
- World Science Festival
- World Science Forum
- World Snowboard Federation
- World Social Forum
- World Squash Federation
- World Ssireum Federation
- Workers Suffrage Federation or its successor the Workers Socialist Federation
- Women's Sport Foundation, the former name of the Women's Sport and Fitness Foundation
- Wyższa Szkoła Filologiczna (Philological School of Higher Educatuion), a private university in Wrocław, Poland