OABA
| Acronym | Definition |
|---|---|
| OABA | Outdoor Amusement Business Association (Winter Park, FL) |
| OABA | Ontario Agri Business Association (est. 1999; Guelph, Ontario, Canada) |
| OABA | Ohio Alpaca Breeders Association (est. 1997) |
| OABA | Ontario Artist Blacksmith Association (Canada) |
| OABA | Ortho-Amino Benzoic Acid (chemistry) |
| OABA | Occupational Allergic Bronchial Asthma |