Last names starting with "O"
- Class of 1968 Peter O Brien
- Class of 1997 Mike O'Brien
- Class of 1979 Michael O'Connell
- Class of 1980 John OConnor
- Class of 1970 Brian Odonnell
- Class of 1989 Jack Ohara
- Class of 1972 Glen Olson
- William Omara
- Class of 1982 Michael Oprondek
- Class of 1975 Dennis Orourke
- Class of 1989 Jeff Oshaughnessy
- Class of 1990 Michael OSullivan
- Class of 1996 Nicholas Oswald
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If you attended Marist High Chicago, IL linois and want to be added to the alumni directory register now to add your name to the alumni list. You can also find out what other graduates are doing now, share memories with other alumn, upload pictures from Marist HS and find other alumni.