- Marita Obando (now Macias), Class of 1990
- Last Updated: 03-May-00
- Theresa O'Brien (now Callopy), Class of 1979
- Last Updated: 02-Oct-07
- Concepcion Ocegueda (now Thompson), Class of 1982
- Last Updated: 18-Aug-01
- Marcos Ochoa, Class of 1993
- Last Updated: 15-Dec-06
- Thomas O'Connor, Class of 1973
- Last Updated: 17-Aug-99
- TK O'Connor, Class of 1982
- Last Updated: 02-Aug-07
- Ninette Odanga, Class of 2000
- Last Updated: 18-Mar-01
- Jose Olivares, Class of 1989
- Last Updated: 02-Jun-07
- Rebecca Olivas (now Martinez), Class of 1987
- Last Updated: 14-Aug-07
- Guinevere Oller (now Ockert soon to be West), Class of 1993
- Last Updated: 10-Feb-07
- Irene Olvera (now Gomez), Class of 1992
- Last Updated: 01-Nov-07
- Todd Olvis, Class of 1986
- Last Updated: 10-Apr-01
- Nick Onate, Class of 1991
- Last Updated: 25-Oct-01
- Phillip O'Riley, Class of 2001
- Last Updated: 06-Oct-01
- Louie Ornelaz, Class of 1966
- Last Updated: 11-Oct-01
- Carolina Orozco (now Ramos), Class of 1982
- Last Updated: 25-Jul-02
- Jaime Orozco, Class of 1995
- Last Updated: 14-Sep-05
- Javier Orozco, Class of 1987
- Last Updated: 29-Jul-05
- Martha G. Orozco (now McClurg), Class of 1983
- Last Updated: 17-Nov-01
- Ruby Orozco (now Manriquez), Class of 2000
- Last Updated: 04-Mar-08
- Ruby Ortega (now Sortillon), Class of 1995
- Last Updated: 15-Feb-06
- David Ortiz, Class of 1997
- Last Updated: 06-Feb-98
- Joana Ortiz, Class of 2004
- Last Updated: 14-Jun-04
- Lily Ortiz (now Garcia), Class of 1987
- Last Updated: 25-Sep-05
- Selene Ortiz (now Carrillo), Class of 1997
- Last Updated: 05-Apr-06
- Stella Ortiz, Class of 2002
- Last Updated: 31-Jan-06
- Susie Ortiz (now Jones), Class of 1976
- Last Updated: 17-Jun-04
- Walter Ortiz, Class of 1984
- Last Updated: 02-May-04
- William Ortiz, Class of 1997
- Last Updated: 11-Aug-06
- Katie Orvik (now Wenrich), Class of 1982
- Last Updated: 23-Jun-99
- Chris Oson, Class of 1981
- Last Updated: 09-Jun-00
- Scotty Oson, Class of 1984
- Last Updated: 25-Dec-01
- Amy Ostberg (now Jantzen), Class of 1989
- Last Updated: 30-Apr-99
- Jesus "Chuy" Osuna, Class of 1972
- Last Updated: 01-Jun-05
- Miguel Osuna, Class of 1998
- Last Updated: 05-Feb-05
- Linda Osuna, Class of 2001
- Last Updated: 04-Oct-04
- Glen Otis, Class of 1980
- Last Updated: 30-Nov-06
- Anthony Owens, Class of 2000
- Last Updated: 10-Feb-05
