IEOC
| Acronym | Definition |
|---|---|
| IEOC | Inland Empire-Orange County (commuter rail line) |
| IEOC | International Egyptian Oil Company (now part of Egyptian Petroleum Corporation; Cairo, Egypt) |
| IEOC | International Eventing Officials Club (est. 1998; equestrians) |
| IEOC | International Equine Ophthalmology Consortium (horse studies) |