Stefan Ritter (born 13 May 1998) is a Canadian male track cyclist, representing Canada at international competitions.

He won the bronze medal at the 2016 Pan American Track Cycling Championships in the 1 km time trial and in the team sprint.

[1] Ritter is the 2016 UCI junior world champion in the 1 kilometre time trial.

Ritter suffered a serious head injury during the 2018 Pan American Track Cycling Championships in Mexico and was admitted to the ICU.

The medical staff was optimistic that Ritter would make a full recovery.