YSF
| Acronym | Definition |
|---|---|
| YSF | Yaesu System Fusion (digital radio system) |
| YSF | Youth Science Foundation (Canada) |
| YSF | Youth Service Fund (United Methodist Youth) |
| YSF | You're So Funny |
| YSF | Youth Sports Festival (various locations) |
| YSF | Yoshida Scholarship Foundation (Japan) |
| YSF | Stony Rapids, Saskatchewan, Canada - Stony Rapids (Airport Code) |
| YSF | Yield Safety Factor |
| YSF | Yale School of Forestry |
| YSF | You're So Fine |
| YSF | Yoshi's San Francisco (Oakland, CA restaurant) |