Last names starting with "O"
- Class of 1970 Barry Obryant
- Class of 1974 Jackie Obryant
- Audrey Oldham
- Class of 1983 Janeen Ondrako (now Schneider)
- Class of 2010 Megan ONeil
- Class of 2014 Morgan Orlando
- Richard Orlick
- Class of 1979 Todd Osborn
- Class of 2011 Abby Oskia
- Class of 2012 Alexander Owens
- Class of 1979 Michael Owens (formerly Michael Owens)
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About the William Mason High School Alumni Directory
Check out all of the names of the William Mason High School alumni that attended high school in Mason that are listed above. Registering will allow you to join the directory. We also encourage you to keep up to date on news and reconnect with William Mason High School alumni.