The 2012 Grand Prix Cycliste de Montréal was the third edition of the Grand Prix Cycliste de Montréal, a single-day professional bicycle road race. It was held on 9 September 2012, over a distance of 205.7 km (127.8 mi), starting and finishing in Montréal, Quebec, Canada. It was the 26th event of the 2012 UCI World Tour season. The race was one of the only two events which are part of the World Tour calendar in North America, the other one being the Grand Prix Cycliste de Québec contested two days prior.