Recipients of the Ontario Association Agricultural Societies (OAAS) Service Diplomas
The Service Diploma is presented to those who have given longtime and meritorious service to the Drumbo Agricultural Society.
| Andrew Laurie | 1947 | |||
| Ray Harmer | 1949 | Ralph Sparks | 1957 | |
| Merle Coleman | 1958 | Mrs Herman Krueger | 1960 | |
| Richard N Baxter | 1960 | Gordon Harrison | 1963 | |
| Elston Pipe | 1965 | Willard King | 1967 | |
| Anna Elmes | 1968 | John Hofstetter | 1970 | |
| Jean Seyler | 1971 | Allen Scott | 1972 | |
| George Sibbick | 1974 | Margaret Vance | 1976 | |
| Nelson King | 1977 | Bessie Macey | 1977 | |
| Keith Hubbard | 1978 | Eileen Hoskin | 1979 | |
| John Perry | 1980 | Layton Hofstetter | 1980 | |
| John Stott | 1981 | Edna Pipe | 1983 | |
| Rita & Harry Clark | 1988 | Edith Cadwell | 1989 | |
| Jean Seyler | 1990 | Audrey Bowman | 1992 | |
| Margaret Vance | 1992 | Bill Goodwin | 1993 | |
| Dan McLaren | 1995 | Dorothy Elmes | 1996 | |
| Brent & Betty Butcher | 1997 | Bernard Blake | 1998 | |
| Grant McLaren | 1999 | Doug Sibbick | 2000 | |
| Jean Shoemaker | 2001 | George & Nancy Kyle | 2002 | |
| Laura & John Taylor | 2006 | Joan Stevenson | 2011 | |
| Jackie Rodger | 2012 | Judi Meadows | 2013 | |
| Joyce Kalbfleisch | 2014 | Catharine Bechard | 2015 | |
| Ross Harrington | 2016 |
