TTHS
| Acronym | Definition |
|---|---|
| TTHS | Trainees, Transients, Holdees, and Students (US Army) |
| TTHS | Thornton Township High School (Blue Island, IL) |
| TTHS | Transit Tech High School (Brooklyn, NY) |
| TTHS | Tuesday, Thursday, Saturday |
| TTHS | Trafalgar Township Historical Society (Canada) |
| TTHS | Temporary Threshold Shift |
| TTHS | Training, Transient, Hospital and School |