Last names starting with "O"
- Daniel O'Connell
- Yolanda Ochoa
- Class of 1979 Betsy Ogina
- Class of 1997 Davinna Ohlson
- Class of 2012 Rocky Olivares
- Class of 1999 Celeste Olivas
- Class of 1977 Grace Olivetti (formerly Huebner)
- Class of 2002 Chanthan Ong
- Class of 1999 Brandi Oriarte (now Kessinger)
- Class of 1983 Christopher Orman
- Class of 1989 Todd Orman
- Class of 2013 Korina Ortiz
- Class of 1981 Regginald Orvin
- Class of 1989 Craig Osterling
- Class of 1985 Lisa Ott
- Class of 2001 Karen Oviedo
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