SSMO
| Acronym | Definition |
|---|---|
| SSMO | Sisters of St. Mary of Oregon (religious order) |
| SSMO | Sudanese Standards and Metrology Organization |
| SSMO | Summary of Synoptic Meteorological Observations |
| SSMO | Ship Safety Management Office (UK) |
| SSMO | State Surface Maintenance Office |
| SSMO | Sewer System Maintenance and Operation Department (Northeast Ohio Regional Sewer District; Cleveland, OH) |