OMSD
| Acronym | Definition |
|---|---|
| OMSD | Ontario-Montclair School District (Ontario, CA) |
| OMSD | Ozark Mountain School District (Arkansas) |
| OMSD | Operations and Mission Support Directorate |
| OMSD | Officier Marinestoomvaartdienst (Dutch) |
| OMSD | One Mass Scale Dominance (physics) |
| OMSD | Operational Maneuver from Strategic Distances (US Navy) |