| Abbreviation | Definition |
|---|---|
| SJ | South Jetty |
| SJ | Swanley Junction |
| SJB | San Juan Bautista |
| SJC | San Juan Capistrano |
| SJC | South Jutland County |
| SJC | St. Johns County, Florida |
| SJD | San Joaquin District, California Department of Water Resources |
| SJR | South Jersey Region |
| SJV | Saint John Valley |
| SJV | San Joaquin Valley, California |
| SK | SasKatchewan |
| SKED | Southeast Kentucky Economic Development |
| SLAC | St. Louis, Awesome Community |
| SLASTO | Safety Licensing Appeals and Standards Tribunals Ontario |
| SLC | State Lands Commission |
| SLC | State Leadership Conference |
| SLC | State Level Coordinator |
| SLCPP | Sanford-Lee County Partnership for Prosperity |
| SLCPP | State & Local Climate Change Program |
| SLH | Spring Lake Heights |