| Abbreviation | Definition |
|---|---|
| BRLA | Big Rideau Lake Association |
| BRLA | Border Regional Library Association |
| BRMBA | Black Rock Mountain Bike Association (Oregon) |
| BROA | British Rig Owners' Association |
| BRPA | Bacolod Racing Pigeon Association |
| BRPA | Baraboo Range Preservation Association |
| BRPA | Bay Ridge Pool Association |
| BRPA | Blue Ridge Parkway Association |
| BRPA | Boston Rental Property Association |
| BRPA | Braddock Road Preservation Association |
| BRPA | British Recovered Paper Association |
| BRRA | British Rayon Research Association |
| BRSA | Belarusian Republican Scout Association |
| BRTA | Beartooth Recreational Trails Association |
| BRTA | Border Route Trail Association |
| BRWA | Bad River Watershed Association |
| BRWA | Blackstone River Watershed Association |
| BRWA | Blue River Watershed Association |
| BRWA | Broad River Watershed Association |
| BRYA | Boonsboro Ruritan Youth Association |