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Name High School Grad Year
Connon Okiharagaines Los Osos High School Class of 2005
Matthew Okimoto Los Osos High School Class of 2008
Stephanie Olafsson Ontario High School
Helen Olcott Chaffey High School Class of 1957
Ralph Olcott Chaffey High School Class of 1962
Katherine Olden Los Osos High School Class of 2006
Ann Oldengarm Ontario Christian High School Class of 1974
Xenia Olguin Valley View High School Class of 2001
Jesus Oligin Chaffey High School Class of 2015
Sue Olinger Chaffey High School Class of 1965
John Oliva Chaffey High School Class of 1987
Mary Oliva Chaffey High School
Roxanne Oliva Ontario High School Class of 1986
Elizabeth Olivad Chaffey High School Class of 2009
Talia Olivares Chaffey High School Class of 2012
Arturo Olivas Chaffey High School Class of 2009
David Olivas Chaffey High School
Elizabeth Olivas Chaffey High School Class of 2009
Gloria Olivas Ontario High School Class of 1974
Joseph Olive Chaffey High School Class of 1980
Paul Olive Chaffey High School Class of 1986
Semisi Olive Chaffey High School Class of 1983
Kevin Oliver Chaffey High School Class of 1979
Joni Olivera Chaffey High School Class of 1972
Ken Olivera Chaffey High School Class of 1974
Alisha Olivo Valley View High School
Viridiana Olivo Chaffey High School
James Ollila Chaffey High School Class of 1959
Milena Olmos Chaffey High School Class of 1995
Ashley Olsan Chaffey High School Class of 1998
Karen Olsen Chaffey High School Class of 1981
Kris Olsen Chaffey High School
Lisa Olsen Chaffey High School
Sandy Olsen Chaffey High School
Barbara Olson Chaffey High School Class of 1966
Georgia Olson Chaffey High School Class of 1966
Melvin Olson Chaffey High School Class of 1972
Sharon Olson Chaffey High School Class of 1962
Dupe Ona Ontario High School Class of 2004
William Oneal Chaffey High School Class of 1984
Daniel Oneill Chaffey High School Class of 1985
Sebastian Orioli Chaffey High School Class of 1991
Laura Ormonde Ontario High School
Juan Ornelas Ontario High School Class of 2009
David Orona Chaffey High School Class of 1979
Mary Orozco Ontario High School Class of 2009
Janette Orr Chaffey High School Class of 1968
Ronald Orr Chaffey High School Class of 1964
John Orrison Chaffey High School Class of 1987
Daniel Ortega Chaffey High School Class of 2001
George Ortega Chaffey High School Class of 2001
Jacqueline Ortega Ontario High School Class of 2007
Nira Ortega Chaffey High School
Teresa Ortega Chaffey High School Class of 2003
Victor Ortega Ontario High School Class of 1981
Adriana Ortiz Ontario High School Class of 2002
Brianna Ortiz Los Osos High School Class of 2010
Ceceli Ortiz Ontario High School
Cesar Ortiz Chaffey High School Class of 2005
Daniel Ortiz Chaffey High School Class of 2006
David Ortiz Chaffey High School Class of 1991
Graciela Ortiz Ontario High School Class of 1986
Jesse Ortiz Ontario High School Class of 1984
Michael Ortiz Ontario High School
Monique Ortiz Chaffey High School Class of 2007
Paola Ortiz Chaffey High School
Patricia Ortiz Chaffey High School Class of 1982
Tanya Ortiz Chaffey High School
Lea Osborn Chaffey High School
Kristen Osendorf Los Osos High School Class of 2006
Kyle Osendorf Los Osos High School Class of 2008
Los Oso Los Osos High School
Osooso Oso Los Osos High School
Carlos Osorio Chaffey High School Class of 1998
Christiam Osorio Los Osos High School Class of 1966
Luis Osornio Chaffey High School Class of 2005
Barbara Osterman Chaffey High School Class of 1948
Marisa Ostic Ontario High School Class of 1992
Jorge Osuna Chaffey High School Class of 1995
Courtney Otis Los Osos High School Class of 2013
Gabriela Otriveros Chaffey High School Class of 1991
Gabriella Otriveros Chaffey High School
Danielle Otto Chaffey High School
Jill Ottoson Chaffey High School
Richard Outfleet Chaffey High School Class of 1960
Janice Overbey Chaffey High School Class of 1983
Geg Overgouw Ontario Christian High School Class of 1980
Leah Ovitt Chaffey High School Class of 1960
Barbara Owens Chaffey High School
Kisatchy Owens Los Osos High School Class of 2005
Robert Owens Chaffey High School Class of 1956
Tracey Owens Chaffey High School Class of 1978
Wayne Owens Chaffey High School Class of 1955
Jesse Ozuna Ontario High School Class of 2011
Kimberly Pabellon Ontario High School Class of 2003
Joyce Pace Chaffey High School Class of 1977
John Pacelli Chaffey High School Class of 1968
Linda Pacelli Chaffey High School Class of 1965
Alejandra Pacheco Chaffey High School Class of 2006
Christian Pacheco Chaffey High School Class of 2013
Erin Pacheco Ontario High School Class of 1998
Michael Pacheco Chaffey High School Class of 2001
Diana Pachon Chaffey High School Class of 1999
Clyde Pack Chaffey High School Class of 1959
Renna Padea Chaffey High School
Albert Padilla Chaffey High School
Anthony Padilla Ontario High School Class of 1993
Anthony Padilla Los Osos High School Class of 2012
Edgar Padilla Ontario High School
Jose Padilla Chaffey High School
Mayra Padilla Chaffey High School Class of 2001
Robbie Padilla Chaffey High School Class of 1981
Rudy Padilla Chaffey High School Class of 1993
Sierra Padilla Los Osos High School Class of 2016
Zaira Padilla Chaffey High School Class of 2008
Joyce Page Chaffey High School
Ryan Page Chaffey High School Class of 1992
Wally Page Chaffey High School
Michelle Palacio Chaffey High School Class of 1990
Francisco Palacios Chaffey High School Class of 2010
Gracie Palacios Ontario High School Class of 1983
Jerry Palacios Chaffey High School Class of 1982
Mercedes Palacios Chaffey High School Class of 2007
Raul Palacios Ontario High School Class of 2002
Richard Palacios Ontario High School Class of 1993
Juiliano Palagonia Chaffey High School Class of 2003
Wayne Palecero Chaffey High School Class of 1966
Andrea Palessiro Chaffey High School Class of 1977
James Palessiro Chaffey High School Class of 1960
Wayne Palessiro Chaffey High School Class of 1966
Patricia Palframan Chaffey High School Class of 1954
Alexandra Palmer Los Osos High School Class of 2008
Spencer Palmer Los Osos High School Class of 2011
Julie Palmisano Chaffey High School Class of 1984
Patrick Palomar Chaffey High School Class of 1998
Rafael Palomino Ontario High School Class of 2012
Veronika Palova Los Osos High School Class of 2011
Angela Pamplin Chaffey High School Class of 1991
Sandy Panas Chaffey High School
Jesus Paniagua Chaffey High School Class of 2010
Faye Panichello Chaffey High School Class of 1987
Adrienne Pankratz Chaffey High School Class of 1998
Marilyn Pannone Chaffey High School Class of 1976
Matthew Pants Chaffey High School Class of 1975
Nicholas Papac Chaffey High School Class of 1970
Nick Papac Chaffey High School Class of 1968
Doug Papp Chaffey High School Class of 1980
Lorena Parada Chaffey High School Class of 1976
Michael Paradis Ontario High School Class of 1965
Ruby Paramo Chaffey High School
Amanda Parilla Chaffey High School Class of 1999
Claudia Parisien Chaffey High School Class of 1965
Norm Parisien Chaffey High School Class of 1965
Hyun Park Los Osos High School Class of 2006
John Park Los Osos High School Class of 2011
Kayla Park Ontario High School Class of 2010
Janet Parke Chaffey High School Class of 1975
Jary Parker Chaffey High School Class of 1961
Jason Parker Chaffey High School Class of 1993
Juliet Parker Chaffey High School
Kevin Parker Los Osos High School Class of 2012
Marilyn Parker Chaffey High School Class of 1971
Marolyn Parker Chaffey High School Class of 1971
Patricia Parker Chaffey High School
Ron Parker Chaffey High School Class of 1970
Patricia Parkes Chaffey High School Class of 1983
Ashley Parks Los Osos High School Class of 2006
Chelsea Parks Los Osos High School Class of 2007
Laura Parks Chaffey High School Class of 1994
Brian Parra Chaffey High School Class of 2008
Carmen Parra Chaffey High School Class of 2002
Maria Parra Chaffey High School Class of 2009
Victor Parra Ontario High School Class of 1994
Victoria Parra Chaffey High School
Eva Parras Chaffey High School Class of 1995
Michael Parrilla Chaffey High School Class of 1995
Mary Parten Chaffey High School Class of 1976
Jennifer Passwaters Los Osos High School Class of 2003
Renee Pastel Chaffey High School Class of 2000
Lynn Pat Chaffey High School Class of 1994
Avi Patel Los Osos High School Class of 2007
Adam Patino Ontario High School Class of 2002
Roxie Patterson Chaffey High School Class of 1974
Jenya Pattison Chaffey High School Class of 1986
Michael Pattison Chaffey High School
Dorothy Patton Chaffey High School
Harold Patton Chaffey High School Class of 1997
Cocek Patty Chaffey High School Class of 1981
Davis Paul Los Osos High School
James Paul Chaffey High School Class of 1962
Margaret Paulin Chaffey High School
Carlos Payan Chaffey High School Class of 1980
Jeremy Payan Chaffey High School Class of 2012
Boyd Payne Chaffey High School Class of 1981
Joanna Payne Ontario High School
Lisa Payne Chaffey High School Class of 1984
Robert Payne Chaffey High School
Ryan Payne Chaffey High School Class of 2001
Michael Peacock Chaffey High School
Scott Pearson Chaffey High School Class of 1984
Sharon Pearson Chaffey High School Class of 1968
Sara Pease Chaffey High School Class of 2000
Duke Pedersen Chaffey High School Class of 1983
Jack Pedro Ontario High School Class of 1977
Edna Peirson Chaffey High School Class of 1945
Tessa Pellegrini Canyon View High School
Emile Pelletier Chaffey High School Class of 1957
Louise Pelletier Chaffey High School Class of 1952
Brian Pellitier Chaffey High School Class of 1981
Brandon Pelsmaker Valley View High School
Janet Pelt Chaffey High School Class of 1952
Erika Pena Chaffey High School Class of 2003
Francisco Pena Chaffey High School Class of 1996
Gloria Pena Chaffey High School Class of 2005
Lorena Pena Chaffey High School Class of 2001
Alejandro Penaloza Chaffey High School Class of 2015
Marcia Pendleton Chaffey High School Class of 1977
Ethan Peng Los Osos High School Class of 2013
Mark Penn Chaffey High School Class of 1980
Angelica Peralta Chaffey High School Class of 2004
Blanca Peralta Ontario High School
Victor Peralta Chaffey High School
Richard Perdomo Chaffey High School Class of 1992
Paul Perea Los Osos High School Class of 2015
Martin Pereida Chaffey High School Class of 2004
John Pereira Chaffey High School Class of 1998
Adam Perez Chaffey High School Class of 2007
Alexandria Perez Los Osos High School Class of 2010
Alexandria Perez Chaffey High School Class of 2001
Alma Perez Ontario High School Class of 1991
Alma Perez Chaffey High School Class of 1992
Armando Perez Ontario High School
Arturo Perez Chaffey High School
Carlos Perez Chaffey High School Class of 1992
Carmen Perez Chaffey High School Class of 1994
Charlie Perez Los Osos High School Class of 2010
Christina Perez Ontario High School Class of 1991
Crystal Perez Ontario High School Class of 2003

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About Ontario, CA Alumni

The listing of alumni from Ontario, CA includes graduates from 13 schools. To filter results, select a Ontario, CA high school using the links to the right. The Ontario alumni list on this page come from a variety of sources. Clicking one of your friends will give you locations that you can get back in touch with the fellow graduate. To view alumni that graduated in Ontario around your class year, enter your graduation year in the search box at the top of the page. You may also be able to find friends close to your home town. We also have listings for graduates from Upland, CA, Montclair, CA, or Chino, CA.

Approximately 52,200 of residents in Ontario (8%) are the normal age for attending high school (15-19). Also, around 20,100 Ontario residents (3%) are the average age for high school seniors (18-19). Population stats are from the United States Census Bureau.