Glen Cairn is a neighbourhood in Kanata South Ward in the west end of Ottawa, Ontario, Canada. It is also the name of a public school in the area. Prior to amalgamation in 2001, it was located in the City of Kanata. It is located in South Kanata, about west of Downtown Ottawa. It was one of the original neighbourhoods in Kanata. The community was built in the 1960s. As of the Canada 2011 Census, there were 9,406 people living in Glen Cairn.