| Abbreviation | Definition |
|---|---|
| SLW | Surf Life for Women |
| SMST | Sierra Marlins Swim Team |
| SNB | Swimming New Brunswick |
| SNZ | Swimming New Zealand |
| SOS | Swim On Side |
| SPA | Swim Parents Association |
| SPAH | Swimming Pool Association of Hawaii |
| SPATA | Swimming Pool Allied Trades Association |
| SPLASH | Special People Like Alec Swimming For Hope |
| SPMS | Southern Pacific Masters Swimming |
| SPMS | Swimming Pool Management Systems |
| SPPA | Swimming Pool Pro Alliance |
| SQUID | Swimming Queers United In Denver |
| SSC | Silver Swimming Certificate |
| SSJ | Swimming Science Journal |
| SSP | Safe Swimming Place |
| STA | Swimming Teachers Association |
| SU | Swim up |
| SUSA | Southern Utah Swimming Association |
| SWB | Swimming While Black |