| Abbreviation | Definition |
|---|---|
| SFI | Students Federation of India |
| SFK | Standup For Kids |
| SFL | Ski for Light |
| SFLSN | South Florida Lymphedema Support Network |
| SFN | Society For Neuroscience |
| SFPA | Syrian Family Planning Association |
| SFPG | Salmon Farm Protest Group |
| SFS | Starfish Family Services |
| SFS | Swing For Sight |
| SFSDRC | SMS Forum for Social Development and Renaissance Cause |
| SFSF | San Francisco Stables Foundation |
| SFSP | Society of Financial Service Professionals |
| SFT | Speak For The Trees |
| SFWA | South Florida Windsurfing Association |
| SGAA | Sweet Grass Arts Alliance |
| SGB | Sustainable Green Bay |
| SGD | SouthEastern Guide Dogs, Inc. |
| SGD | SouthEastern Guide Dogs, Incorporated |
| SGDI | SouthEastern Guide Dogs, Inc. |
| SGDI | SouthEastern Guide Dogs, Incorporated |