OLCA
| Acronym | Definition |
|---|---|
| OLCA | Observatorio Latinoamericano de Conflictos Ambientales (Spanish: Center for Latin American Environmental Conflicts; Chile) |
| OLCA | Ohio Lawn Care Association (Zanesville, OH) |
| OLCA | Ohio Lactation Consultant Association |
| OLCA | Office of Legislative and Congressional Affairs |
| OLCA | Ontario Lottery Corporation Act |
| OLCA | Orchidland Community Association, Inc. |