| Abbreviation | Definition |
|---|---|
| SOY | Save Our Youth |
| SOY | Strengthen Our Youth |
| SOY | Supporting Our Youth |
| SOYO | Society of Orthodox Youth Organization |
| SOYO | Society of Orthodox Youth Organizations |
| SOYO | Support Our Youth Officials |
| SPEEDY | Signal Processing Educational Engineering Device for Youth |
| SPIFFY | Strategic Planning Initiative for Families and Youth |
| SPIY | Skills for Preventing Injury in Youth |
| SPPY | San Pedro Peninsula Youth |
| SPPY | Society for Promoting the Productivity of Youth |
| SPUB | Student Publications |
| SPY | Scrabo Presbyterian Youth |
| SPY | Sindh Peoples Youth |
| SPY | St Paul Youth |
| SPY | Summer Program for Youth |
| SPYA | South Park Youth Association |
| SPYA | South Parkland Youth Association |
| SPYA | Stockton Police Youth Activities |
| SPYA | Summit Parkland Youth Association |