Last names starting with "O"
- Class of 2013 Matthew O'Brien
- Class of 1926 Mary O'Reilly
- Class of 1963 Sylvia Oberg
- Class of 1947 Ken Oberholtzer
- Kenneth Oberholtzer
- Ann Marie Obie
- Kelly Obrien
- Class of 2005 Michael Ohara
- Class of 1964 David Oikemus
- David Oliver
- Class of 1978 Mike Oneal
- Crystal Oneil
- Class of 1970 Michael Orourke
- Class of 1993 Silvia Ortiz
- Class of 1977 Kathy Ouellette
- Justin Ovaska
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About the Gardner High School Alumni Directory
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