| Acronym | Definition |
|---|
| WRTA | Western Reserve Transit Authority (Northeast Ohio) |
| WRTA | Worcester Regional Transit Authority (Massachusetts) |
| WRTA | World Religious Travel Association |
| WRTA | Western Regional Transmission Association |
| WRTA | Western Rural Telephone Association |
| WRTA | Wind River Transportation Authority (Fremont County, Wyoming) |
| WRTA | Western Region Tennis Association (Australia) |
| WRTA | Waccamaw Regional Transportation Authority |
| WRTA | Western Region Technical Attachment |
| WRTA | Windham Rail Trail Alliance (Windham, NH) |
| WRTA | Wire Rope Technology Aachen (Germany) |
| WRTA | Wulftec Rotary Arm |
| WRTA | Western Region Transmission Association |
| WRTA | Wisconsin Retired Teachers Association (now Wisconsin Retired Educators' Association) |
| WRTA | World Rally Team Association |
| WRTA | Workshop on Real-Time Applications |
| WRTA | Wild Rice Trail Association (Canada) |
| WRTA | Western Railroad Traffic Association |
| WRTA | Western Region Telephone Association |
| WRTA | Wiltshire Rocks Tsunami Appeal (UK) |
| WRTA | Winnipesaukee River Trail Association |
| WRTA | Wainwright Retired Teachers' Association (Wainwright, AB, Canada) |
| WRTA | West River Trail Association |