Alumni
- Ian Logan, Canadian Football player, Safety for the Winnipeg Blue Bombers.
- David Halk, former guitarist for avant-garde band What's He Building in There?.
- John Mitchell, currently playing in the NHL for the New York Rangers.
- C. Ernst Harth - Character actor known for such films as Smokin' Aces 2: Assassins' Ball, Scooby-Doo 2: Monsters Unleashed and Thir13en Ghosts.
- Jacob Morris, Producer of The Avenue Web Series.
- Michael McDonald (poker player) - youngest player to ever win an EPT European Poker Tour main event
- Daniel Burd a 16 year old student at Waterloo Collegiate made international headlines by discovering a plastic eating microbe as part of his science fair entry.
Read more about this topic: Waterloo Collegiate Institute