| Abbreviation | Definition |
|---|---|
| SYC | Syracuse Yacht Club |
| SYF | Sport Youth Foundation |
| SYF | Stanwood Youth Football |
| SYF | Summer Youth Fitness Program |
| SYG | State Youth Games |
| SYH | Salem Youth Hockey |
| SYH | Springfield Youth Hockey |
| SYL | Sunnyvale Youth League |
| SYO | South Yorkshire Orienteers |
| SYO | Splat You're Out Paintball |
| SYP | Scuba Yellow Pages |
| SYTC | Sandy Young Training Center |
| SYV | Snowmobile - Yamaha Viper |
| SYV | Springfield Youth Volleyball |
| SZ | Soap Zone |
| SZ | Sweet Zone |
| SZA | Sinsanate Zanozani Akili |
| SZG | Sangamon Zen Group |
| SZG | System Zero Gaming |
| SZO | Soft ZOne |