- YSS stands for Youth Support Services (various locations)
- YSS stands for Youth Services Section (New York Police Department; New York, NY)
- YSS stands for You Suck Severely
- YSS stands for Youth and Shelter Services, Inc (Ames, IA)
- YSS stands for You’re So Slow
- YSS stands for Yanic Simard Selected (Toronto Interior Design Group; Toronto, Canada)
- YSS stands for You’re So Sweet
- YSS stands for You’re So Smart
- YSS stands for Young Spectroscopist Symposium (South Africa)
- YSS stands for Yemeni Student Society
- YSS stands for Yaw Sun Sensor
YSS