| 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. |