| TRHA | Ted Reeve Hockey Association (est. 1954; Toronto, Ontario, Canada) 
| Others |
| TRHA | Ted Reeve Hockey Association (est. 1954; Toronto, Ontario, Canada)
| Others |
| TRHA | Texas Residence Hall Association
| Others |
| TRHA | Texas Robin Hunting Association
| Others |
| TRHA | Texas Rural Health Association
| Others |
| TRHA | Twin Rivers Homeowners' Association
| Others |
| TRHA | Twyford & Ruscombe Horticultural Association (Berkshire, England)
| Others |