YCS
| Acronym | Definition |
|---|---|
| YCS | Yu-Gi-Oh Championship Series (card game) |
| YCS | Yukon Conservation Society (Canada) |
| YCS | Years Commissioned Service (US DoD) |
| YCS | Young Catholic Students (various locations) |
| YCS | Yale Classical Studies |
| YCS | Yellow Card Scheme (adverse drug reaction reporting system; UK) |
| YCS | You Can Succeed (student program) |
| YCS | Youth Clinical Services (Toronto, Canada) |
| YCS | Yarmouth Central School (Canada) |
| YCS | Yankee Computer Society |