| OPH | Object Placement Helper
| Others |
| OPH | Office of Public Health
| Others |
| OPH | Office of Public Hearings
| Others |
| OPH | Oil Patch Hotline
| Others |
| OPH | Old Params Handle
| Others |
| OPH | Old Parliament House
| Others |
| OPH | Old People Humor
| Others |
| OPH | Old Peoples' Home
| Others |
| OPH | One Person Health
| Others |
| OPH | Open Public Hearing
| Others |
| OPH | Operation Paws for Homes
| Others |
| OPH | Operation Phone Home
| Others |
| OPH | Operation Politically Homeless
| Others |
| OPH | Ophthalmologist
| Others |
| OPH | Orange Park High
| Others |
| OPH | Organization for Psychological Health
| Others |
| OPH | Orientation to Public Health
| Others |
| OPH | Original Pancake House
| Others |
| OPH | Oromocto Public Hospital
| Others |
| OPH | Orthopaedic Physically Handicapped
| Others |
| OPH | Orthopedic Physically Handicapped
| Others |
| OPH | Other People's Hardware
| Others |
| OPH | Ottawa Public Health
| Others |
| OPH | Otto Petersen Haus
| Others |