THSA
| Acronym | Definition |
|---|---|
| THSA | Theatre Historical Society of America (est. 1969; Elmhurst, IL) |
| THSA | Trimmable Horizontal Stabilizer Actuator |
| THSA | Texas Head Start Association (est. 1965; Victoria, TX) |
| THSA | Turkey Head Sailing Association (Victoria, British Columbia, Canada) |
| THSA | The Han Solo Adventures (Star Wars) |
| THSA | Texas Historic Sites Atlas |