The 2015 CIS football season began on August 30, 2015 with ten Ontario University Athletics teams playing that day. The season concluded on November 28 with the UBC Thunderbirds defeating the Montreal Carabins 26-23 in the 51st Vanier Cup championship at Telus Stadium in Quebec City. This year, 27 university teams in Canada played Canadian Interuniversity Sport football, the highest level of amateur Canadian football.