Last names starting with "O"
- Class of 1959 Mary Oakley
- Class of 1998 Matthew Odorowski
- Class of 1981 Gustavo OHara
- Class of 2001 Erick Olivar
- Class of 1981 Michael Oliver
- Class of 1998 Holly Olson (formerly Burwell)
- Class of 1987 Shannon Omara
- Class of 1971 Dan Oneil
- Class of 2003 Justin Opengo
- Class of 2007 Kaila Osborne
- Class of 1996 Karen Osborne
- Class of 1974 Diane Osterberg
- Class of 1993 Jerelyn Ottman
- Class of 1976 Kristine Overall
- Class of 1976 Kristine Overall Overall
- Class of 1993 Marla Owens
- Schree Owens
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