Mark Oldershaw (born February 7, 1983 in Burlington, Ontario) is a Canadian sprint canoer who competed in the late 2000s. At the 2008 Summer Olympics in Beijing, he was eliminated in the semifinals of the C-1 500 m event. He is a son of Scott Oldershaw.
Mark was a double gold-medalist at the Junior World Championships in 2001, winning both the C-1 500 m and C-1 1000 m events. Mark recently participated in the 2011 world championships in Szeged, Hungary where he came 5th in the C-1 1000 meter event.