Headmasters
| Period | Details |
|---|---|
| 1913 | Kenneth Thorn Henderson |
| 1913 – 1916 | William G. Hilliard |
| 1916 | Arthur Alston |
| 1917 – 1922 | Frank Archer |
| 1923 – 1928 | George Edward Weeks |
| 1929 – 1934 | William G. Hilliard |
| 1935 – 1937 | Percival William Stephenson |
| 1938 – 1942 | Vernon S. Murphy |
| 1944 – 1974 | James Wilson Hogg |
| 1975 – 1996 | Roderick Ian West |
| 1996 – | George Milton Cujes |
Read more about this topic: Trinity Grammar School (New South Wales)