St Peter's College has honoured old boys as "Old boys of Distinction" including the following: Old boys also include writers and poets Sam Hunt, Terry Locke, David McGill, Michael Morrissey, John Trenwith, Mark Williams, and from the earlier St Peter's, William Eugene Outhwaite.
There are ten old boys who became All Blacks[4] including Bernie McCahill, second five-eighth and centre three-quarter (1987–1991), the lock, Patrick Tuipulotu (appointed captain in 2024),[5] the wing, AJ Lam and fly-half Harry Plummer.
In the nineteenth century, Matthew Joseph Brodie (1864–1943), second Bishop of Christchurch received part of his education at the "Pitt St [Catholic] School" (St Peter's School).
[6] Martyn Dunne (as Brigadier) commanded New Zealand and international forces in East Timor (1999–2000).
St Peter's has also produced politicians including five Members of Parliament (four of them were also Cabinet Ministers) and a Mayor of Auckland.