| Abbreviation | Definition |
|---|---|
| SJR | St. John the Russian Orthodox Church |
| SJS | Shine Jesus Shine! |
| SJS | St. John's School |
| SJS | St. John's Seminary |
| SJS | St. Joseph School |
| SJV | Saint John Vianney |
| SK | Second Kingdom |
| SKATE | Spreading Kindness And Thoughtfulness Everywhere |
| SKC | Soul Keepers Clan |
| SKL | Sepulchral Keepers of Life |
| SKML | Singapore Kadayanallur Muslim League |
| SKMT | Special Kids Ministry Team |
| SKO | Soul Kingdom Online |
| SKO | Street Kids Outreach |
| SKOL | Stichting Katholiek Onderwijs Leiden |
| SKP | Special Kind of People |
| SKSSF | Smastha Kerala Sunni Students Federation |
| SKY | Sabbath Keeping Youth |
| SL | Satan's Lovers |
| SLAB | Students Learning About the Bible |