OMCA
| Acronym | Definition |
|---|---|
| OMCA | Open Manage Client Administrator |
| OMCA | Ontario Motor Coach Association |
| OMCA | Ontario Mathematics Coordinators Association (Canada) |
| OMCA | Omron Management Center of America, Inc. (Schaumburg, IL) |
| OMCA | Oxford Monographs on Classical Archaeology (publication; Oxford University Press; UK) |
| OMCA | Office for Multicultural Affairs (Germany) |
| OMCA | Oregon Medical Cannabis Award (Portland, OR) |