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