| SYO | Saskatoon Youth Orchestra
| Others |
| SYO | Schaumburg Youth Orchestra
| Others |
| SYO | Serious Youthful Offenders
| Others |
| SYO | Sharonville Youth Organization
| Others |
| SYO | Sindh Youth Organization
| Others |
| SYO | Social Youth Organization
| Others |
| SYO | South Yorkshire Orienteers
| Others |
| SYO | Southside Youth Outreach
| Others |
| SYO | Splat You're Out Paintball
| Others |
| SYO | Springfield Youth Organization
| Others |
| SYO | Stockport Youth Orchestra
| Others |
| SYO | Stuff Your Own
| Others |
| SYO | Superior Youth Organization
| Others |
| SYO | Sutter Youth Organization
| Others |
| SYO | Sydney Youth Orchestra
| Others |
| SYO | Sydney Youth Orchestras
| Others |
| SYO | Symphonic Youth Orchestra
| Others |