| Acronym | Definition |
|---|
| MRBA | Market Research Benevolent Association (UK) |
| MRBA | Mississippi River Basin Alliance |
| MRBA | Michigan Road Builders Association |
| MRBA | Buenos Aires (airport code) |
| MRBA | Martin's Rose Bengal Agar |
| MRBA | Macedon Ranges Basketball Association (est. 1985) |
| MRBA | Montana Rockies Bluegrass Association (Missoula, MT) |
| MRBA | Mississippi River Bridge Authority (now Crescent City Connection Division; Louisiana) |
| MRBA | Marshall Ramsey Blogaholics Anonymous |
| MRBA | Mississippi Road Builders' Association |
| MRBA | Material Review Board Action |