| Acronym | Definition |
|---|
| WTRA | Wales Trekking and Riding Association |
| WTRA | Western Tropical Atlantic |
| WTRA | Welsh Trail Riders Association |
| WTRA | Whitemarsh Township Residents Association (Lafayette Hill, PA) |
| WTRA | Western Tidewater Radio Association (Smithfield, Virginia) |
| WTRA | Whitstable Toy Run Association (UK) |
| WTRA | Weapons Transfer |
| WTRA | Wisconsin Therapeutic Recreation Association |
| WTRA | Weyburn Terrace Residents Association (UCLA) |
| WTRA | West Texas Repeater Association (El Paso, TX) |
| WTRA | Washington Trail Riders Association (Vancouver, WA) |
| WTRA | West Tennessee Reading Association |
| WTRA | W-Tenants Rights Association |
| WTRA | Western Tradition (course) |
| WTRA | West Texas Ranch Adventure |
| WTRA | Waste Tyre Regulation Act (South Africa) |
| WTRA | Write Touch Readers' Award |
| WTRA | Westbound Transpacific Rate Agreement |
| WTRA | West Tennessee Railroad Authority |
| WTRA | Wet Tuchtrecht Accountants |
| WTRA | Weald Tenant Residents Association |
| WTRA | Wishing To Remain Anonymous |
| WTRA | Weak Translatability |
| WTRA | Women's Team Roping Association |
| WTRA | Welsh Trekking and Riding Association |
| WTRA | Wildlife Tree Retention Area (Canada) |
| WTRA | Waterside Towers Residents Association |
| WTRA | Wyoming Team Roping Association |
| WTRA | Working Together for Rural Action |
| WTRA | World Truck Racing Association |