Last names starting with "O"
- Class of 1969 Richard O Brien
- Class of 1980 David O'Dell
- Class of 1995 Toni O'Hern
- Class of 1972 Susan Oberman (now Hathaway)
- Class of 1978 Leonard Obringer
- Class of 1975 Michael Ofcharik
- Class of 1975 Joyce On
- Class of 1969 Thomas Oneal
- Class of 1968 Selina Opfer
- Class of 1967 Ken Osleger
- Class of 1981 Eric Ostrander
- Class of 1972 Linda Ostrander
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About the Ringgold High School Alumni Directory
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