| Acronym | Definition |
|---|
| OWCA➣Old Wesley Collegians Association (est. 1926; Australia) |
| OWCA➣Office of Workers' Compensation Administration (Louisiana Department of Labor) |
| OWCA➣Ontario Wood Carvers Association (Toronto, Ontario, Canada) |
| OWCA➣Obed Watershed Community Association (Crossville, TN) |
| OWCA➣Origination without a Cool Acronym |
| OWCA➣Organization without a Cool Acronym (Phineas and Ferb cartoon) |
| OWCA➣Old Westminster Citizen Association (Westminster City School, London, UK) |