Last names starting with "O"
- Class of 2007 Michelle O'Neill
- Class of 1998 Lisa Obrien
- Class of 1993 Mike Obrien
- Class of 1972 Doreen Oconnor
- Class of 1996 Catherine Odell
- Class of 1975 Julie ODell
- Jonathan Olmstead
- Class of 1982 Alicia Olsen
- Class of 1981 David Olsen
- Janet Olsen
- Class of 1981 David Olson
- Class of 1961 Gene Olson
- Class of 1972 Scott Ondras
- Class of 1972 MIchelle ONeill
- Class of 1981 Bruce Opsal
- Class of 1978 Kort Orr
- Class of 1996 Machelle Ortuno
- Class of 1986 Michelle Osborne
- Class of 1958 Ron Osborne
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About the Issaquah High School Alumni Directory
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