| Acronym | Definition |
|---|
| OCDA➣Orange County District Attorney (California) |
| OCDA➣Ohio Choral Directors Association |
| OCDA➣Ozark Cave Diving Alliance |
| OCDA➣Oregon Career Development Association |
| OCDA➣Office of Cross-Disciplinary Activities (National Science Foundation) |
| OCDA➣Oklahoma Civil Defense Agency (Oklahoma City, OK) |