| Abbreviation | Definition |
|---|---|
| OMHS | Owings Mills High School |
| OMIS | Oak Mountain Intermediate School |
| OMS | Oakbrook Middle School |
| OMS | Oakdale Middle School |
| OMS | Oakland Middle School |
| OMS | Obsidian Middle School |
| OMS | Ocoee Middle School |
| OMS | Okemo Mountain School |
| OMS | Oliver Middle School |
| OMS | Olson Middle School |
| OMS | onieda middle school |
| OMS | Ooltewah Middle School |
| OMS | Ooltewah Middle School's |
| OMS | Orchard Middle School |
| OMS | Orefield Middle School |
| OMS | Osseo Middle School |
| OMS | Ottoson Middle School |
| OMS | Overlook Middle School |
| OMS | Owensboro Middle School |
| OMS | Oxford Middle School |