| Acronym | Definition |
|---|
| SMSA | Sydney Mechanics' School of Arts (Australia) |
| SMSA | Standard Metropolitan Statistical Area |
| SMSA | School Meals Supervisory Assistant (UK) |
| SMSA | National Association of State Motorcycle Safety Administrators |
| SMSA | Southern Maryland Sailing Association |
| SMSA | Seabee Memorial Scholarship Association |
| SMSA | Smoky Mountain Soaring Association (aviation) |
| SMSA | Sheffield Malaysian Students Association (UK) |
| SMSA | Suomen Murteiden Sana-Arkisto (Finnish) |
| SMSA | Singapore Malaysian Student Association |
| SMSA | Stittsville Minor Softball Association (Canada) |
| SMSA | Seaman Apprentice, Signalman Striker (Naval Rating) |
| SMSA | Surrey Masonic Sports Association (UK) |
| SMSA | Sprint Metropolitan Service Area |