IEOA
| Acronym | Definition |
|---|---|
| IEOA | Indexed Effective Orifice Area |
| IEOA | Island Equipment Owners Association (est. 1964; Canada) |
| IEOA | International Equestrian Organisers' Alliance |
| IEOA | Irish Exhibition Organisers Association (trade body; Dublin, Ireland) |
| IEOA | Indiana Escort Owners Association (car club) |