| Acronym | Definition |
|---|
| SIJ | Sacroiliac Joint |
| SIJ | Special Immigrant Juvenile |
| SIJ | Sistema Integrado de Justicia (Spanish: Integrated Justice System) |
| SIJ | St. Isaac Jogues (church; various locations) |
| SIJ | Stand-In Jamming |
| SIJ | Suresnes Information Jeunesse (French: Suresnes Youth Information) |
| SIJ | Signal Initiated Jamming |
| SIJ | Scientific International Journal (Bayamón, Puerto Rico) |
| SIJ | Service Insertion Jeunes (French: Youth Service Integration) |
| SIJ | Sisters of the Infant Jesus (Catholic order) |
| SIJ | Section Identité Judiciaire (French: Criminal Records Section; Canada) |