YSAS
| Acronym | Definition |
|---|---|
| YSAS | Youth Substance Abuse Service |
| YSAS | Yaw Stability Augmentation System (aviation) |
| YSAS | Young Sikh Association Singapore |
| YSAS | Young Scientist Award Session (Society for Experimental Biology; UK) |
| YSAS | Yanmar Sales and After Sales Services |
| YSAS | Young Society Against Swearing |