A-Z Department Index
- Ocean and Coastal Law Center
- Office of Academic Advising - see: Academic Advising, Office of Facebook YouTube
- Office of Governmental Affairs - see: Public and Government Affairs (Government Affairs)
- Office of Human Subjects Compliance - see: Human Subjects, Office for Protection of
- Office of Insitutional Equity and Diversity - see: Institutional Equity and Diversity, Office of
- Office of International Affairs - see: International Affairs, Office of
- Office of Multicultural Academic Success - see: Multicultural Academic Excellence, Center for (formerly Office of Multicultural Academic Success)
- Office of Public Records - see: Public Records, Office of
- Office of Research and Faculty Development - see: Research Development Services
- Office of Responsible Conduct of Research (ORCR) - see: Research Compliance Services
- Office of Student Advocacy - see: Student Advocacy, Office of
- Officers of Administration Council
- Old Oregon - see: Oregon Quarterly
- Online Courses - see: Distance Education
- Online Handbook for Management, Administrative, and Clerical Employees (OHMAC)
- Oregon Bach Festival Facebook
- Oregon Center for High Energy Physics
- Oregon Center for Optics
- Oregon Consortium for International and Area Studies
- Oregon Daily Emerald
- Oregon Folklife Network Facebook
- Oregon Hillel
- Oregon Humanities Center Facebook
- Oregon Institute of Marine Biology (OIMB)
- Oregon MBA Program (Lundquist College of Business) Facebook Twitter
- Oregon Nanoscience and Microtechnologies Institute (ONAMI)
- Oregon Quarterly
- Oregon State Museum of Anthropology - see: Museum of Natural and Cultural History Facebook
- Orientation Programs
- Osher Lifelong Learning Facebook
- Outdoor Program Facebook Twitter
- Outdoor Pursuits Program