Alumni Alpha Listing
| 1969 | Lawrence | Buzzy | Proudfoot Jr | |
| 1998 | William | O'Banion | O'Banion | |
| 1986 | Heather | O'Brien | ||
| 1983 | Lisa | O'Brien | ||
| 1981 | Tammy | O'Brien | ||
| 1939 | John | O'Connor | ||
| 1941 | Howard | Oden | (Buck) | d: 11/18/2005 |
| 1993 | Jeffrey | Oden | Oden | |
| 1974 | Kathy | Oden | Dinterman | |
| 1981 | Mary | Oden | ||
| 1983 | Paul | Oden | Oden | |
| 1986 | Paula | Oden | ||
| 1956 | Shirley | Oden | ||
| 1988 | Wendy | Oden | ||
| 1966 | William | Oden | Oden | |
| 1998 | Emily | Odom | ||
| 1999 | Andrea | Ofand | Ofand | |
| 1941 | Charlotte | Ohara | Bolander | *8/29/2001 |
| 1972 | Kathereen | O'Hara | ||
| 1973 | Margaret | O'Hara | ||
| 1975 | Michael | O'Hara | ||
| 1977 | Patricia | O'Hara | ||
| 1963 | Sharon | O'hara | ||
| 1981 | Teresa | O'hara | ||
| 1979 | Lawrence | O'Hara Jr | O'Hara Jr | |
| 1938 | Patricia | O'Harra | ||
| 1996 | Alyssa | Oland | ||
| 1997 | Ashley | Oland | ||
| 1997 | Cheryl | Ollry | ||
| 1998 | Mathew | Ollry | Oilry | |
| 1982 | Rebecca | Olpin | ||
| 1986 | Ruth | Olpin | ||
| 1968 | Larry | Ondardonk | Ondardonk | |
| 1985 | Kevin | O'Neill | O'Neill | |
| 1968 | Gloria | Onley | ||
| 1974 | James | Onley | Onley | |
| 1976 | Kevin | Onley | Onley | |
| 1950 | Bernard | Orndorff | Orndorff | |
| 1956 | Clara | Orndorff | ||
| 1952 | David | Orndorff | Orndorff | |
| 1941 | Eileen | Orndorff | Houlihan | |
| 1944 | Evelyn | Orndorff | Best | |
| 1945 | Gilbert | Orndorff | Orndorff | |
| 1931 | Jess | Orndorff | ||
| 1969 | Karen | Orndorff | ||
| 1985 | Keith | Orndorff | Orndorff | |
| 1935 | Lawrence | Orndorff | ||
| 1982 | Lisa | Orndorff | Lajerski | * 8/24/2002 |
| 1931 | Mary | Orndorff | Cumings | |
| 1990 | Michael | Orndorff | Orndorff | |
| 1946 | Richard | Orndorff | Orndorff | |
| 1988 | Timothy | Orndorff | ||
| 1930 | Austin | Orrison | ||
| 1975 | Britt | Orrison | Orrison | |
| 1981 | Christopher | Orrison | Orrison | |
| 1938 | Keiffer | Orrison | ||
| 1947 | Paul Lee | Orrison | Orrison | |
| 1936 | Ruth | Orrison | ||
| 1939 | William | Orrison | ||
| 1972 | Paul | Orrison Jr | Orrison Jr | |
| 1992 | Chad | Orye | Orye | |
| 1984 | Dana | Orye | ||
| 1966 | Drew | Orye | Orye | |
| 1961 | George | Orye | Orye | 9/12/2000 |
| 1999 | Jera | Orye | ||
| 1962 | Jerry | Orye | Orye | |
| 1987 | Paul | Orye | Orye | |
| 1993 | Peggy | Orye | ||
| 1997 | Melissa | Osborne | ||
| 1973 | Dianne | Overton | ||
| 1999 | Jennilee | Owens | ||
| 1945 | Edward | Pace | Pace | |
| 1942 | Lois | Pace | Nuse | |
| 1946 | Mary Jane | Pace | Johnson | |
| 1991 | Thomas | Pack | ||
| 1980 | April | Page | ||
| 1998 | Heather | Page | ||
| 1997 | John | Page | Page | |
| 1953 | Dale |