- YSG stands for Yellow Shirt Guy
- YSG stands for Young Solicitors Group (now Junior Lawyers Division of the Law Society; London, England, UK)
- YSG stands for Yale Security Group (various locations)
- YSG stands for Yoko-Shiho-Gatame (martial arts)
- YSG stands for You’re So Gay
- YSG stands for Yokohama Shakespeare Group (Japan)
- YSG stands for Young Shannon Gold Mines, Limited
- YSG stands for Youth Strategy Group
YSG