OECC
| Acronym | Definition |
|---|---|
| OECC | Old English Car Club (Canada) |
| OECC | Overseas Environmental Cooperation Center |
| OECC | Oesterreichischer Citroën Club (German; automobile club; Austria) |
| OECC | Optoelectronic and Communications Conference |
| OECC | Ohio & Erie Canalway Coalition (est. 1989) |
| OECC | Ozarks Electric Cooperative Corporation (Fayetteville, AR) |
| OECC | Open End Correction Coefficient (acoustics) |