The University of Maine
O
- Observatory (Department of Physics and Astronomy)
- Office for Community and Connections
- Office of Admissions
- Office of Assessment
- Office of Budget and Business Services
- Office of Community Standards, Rights, and Responsibilities
- Office of Facilities Management
- Office of Human Resources
- Office of Institutional Research
- Office of Major Scholarships
- Office of Research Administration (Office of Research and Sponsored Programs)
- Office of Sexual Assault and Violence Prevention
- Office of Student Employment
- Office of Student Financial Aid
- Office of Student Records
- Office of Sustainability
- Office of the Executive Vice President for Academic Affairs and Provost
- Office of the President
- Office of the Vice President for Research
- Office of University Development (see: University of Maine Foundation)
- Online Education
- Orientation
- Orono Bog Walk
- Orono Fire Department