OFA
- Cyclone Ofa
- Fiji women's national basketball team
- OFA (Oxlade From Africa)
- Ofa Faingaʻanuku
- Ofa Kugbe
- Ofa Swann
- Ofa Tu'ungafasi
- Ogdensburg Free Academy
- Oman Football Association
- Ontario Federation of Agriculture
- Ontario Football Alliance
- OpenDocument Format Alliance
- Oracle Fusion Applications
- Organizing for Action
- Organizing for America
- Orthopedic Foundation for Animals
- Ufa
- ‘Ofa Likiliki