| Acronym | Definition |
|---|
| OMH | Oh My Heavens |
| OMH | Oh My Heck |
| OMH | Outpatient Mental Health (various locations) |
| OMH | Office of Mental Health |
| OMH | Oh My Hemmings |
| OMH | Old Mother Hubbard |
| OMH | Office of Minority Health |
| OMH | Orange County (airport code, VA) |
| OMH | Oconee Memorial Hospital (Seneca, SC) |
| OMH | On My Honor |
| OMH | Open Market Handset (telecommunications) |
| OMH | Old Meeting House (various organizations) |
| OMH | Oh My Hell |
| OMH | Office Municipal d'Habitation |
| OMH | Ookurayama Memorial Hospital (Japan) |
| OMH | One Minute Halo (band) |
| OMH | Oatmeal Milk and Honey (soap) |
| OMH | Ohhh... My Head.. (beer rating organization) |
| OMH | Oh My Hat |
| OMH | Outta My Hands |