| OGA | New Hampshire Old Graveyard Association 
| Others |
| OGA | Oak Grove Alpaca
| Others |
| OGA | Obstetrical And Gynecological Associates
| Others |
| OGA | Office Genuine Advantage
| Others |
| OGA | Office of Global Affairs
| Others |
| OGA | Office of Governmental Accountability
| Others |
| OGA | Office of Grants Administration
| Others |
| OGA | Office of the General Assembly
| Others |
| OGA | Official Gang Alliance
| Others |
| OGA | Ogallala, Nebraska USA
| Others |
| OGA | Ohio Gas Association
| Others |
| OGA | Ohio Glass Association
| Others |
| OGA | Ohio Golf Association
| Others |
| OGA | Ohio Grocer Association
| Others |
| OGA | Oil and Gas Authority
| Others |
| OGA | Oil Gear Automotive
| Others |
| OGA | Oklahoma Golf Association
| Others |
| OGA | Oman Gibson Associates
| Others |
| OGA | On Good Authority
| Others |
| OGA | One General Agency
| Others |
| OGA | One Goofy Asian
| Others |
| OGA | Onigokko Grand Athletics
| Others |
| OGA | Online Gamers Association
| Others |
| OGA | Online Gaming Addicts
| Others |
| OGA | Online Gaming Alliance
| Others |
| OGA | Online Graphics Associates
| Others |
| OGA | Ontario Greenbelt Alliance
| Others |
| OGA | Open Gaming Alliance
| Others |
| OGA | ORACLE Grants Accountihg
| Others |
| OGA | Orchid Guild of the Americas
| Others |
| OGA | Oregon Geographic Alliance
| Others |
| OGA | Oregon Gerontological Association
| Others |
| OGA | Oregon Golf Association
| Others |
| OGA | Oregon Gymnastics Academy
| Others |
| OGA | Other Goverment Agency
| Others |
| OGA | Other Government Agency
| Others |
| OGA | Outdoor Guides Association
| Others |
| OGA | Outer Gimbal Angle
| Others |
| OGA | Outer Gimbal Axis
| Others |
| OGA | Outwood Grange Academy
| Others |
| OGA | Ozone Gas Analyzer
| Others |