Principals
- 1829-38: Rev. Joseph H. Harris
- 1839-43: Rev. John McCaul
- 1843-56: Frederick W. Barron
- 1857-61: Rev. Walter Stennett
- 1861-81: George R. Cockburn
- 1881-85: John Milne Buchan
- 1885-95: George Dickson
- 1895-1902: George R. Parkin
- 1902-17: Henry W. Auden
- 1917-35: William L. Grant
- 1935-42: Terence W.L. MacDermot
- 1942-48: Lorne M. McKenzie
- 1948-65: Rev. C.W. Sowby
- 1965-74: Patrick T. Johnson
- 1974-88: Richard H. Sadlier
- 1988-92: Eric Barton
- 1992-2004: J. Douglas Blakey
- 2004-pres.: Dr. James Power
Read more about this topic: History Of Upper Canada College