Last names starting with "O"
- Class of 1968 Daniel O'Brien
- Class of 1999 Mark O'Leary
- Class of 1997 Dan Obrien
- Class of 1977 Peter Ochal
- Morgan Oconnor
- Class of 1993 Nicole Olivieri
- Class of 1979 Claire Olsofsky
- Class of 1996 Melanie Orciuch
- Class of 1973 Debra Ordway
- Class of 1968 Rob Osborn (formerly McNamara)
- Class of 1968 Robert Osborn
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About the Algonquin High School Alumni Directory
Check out all of the names of the Algonquin High School alumni that attended high school in Northborough 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 Algonquin High School alumni.