OUSA may mean:
- The Ontario Undergraduate Student Alliance
- The Open University Students Association, the students' union of the Open University
- The Organization of African Trade Union Unity (Organisation de l'Unité Syndicale Africaine)
- Orienteering USA, the national sports governing body for orienteering in the United States
- OrigamiUSA The largest Origami society in the USA
- The Otago University Students' Association
This disambiguation page lists articles associated with the title OUSA.
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