Keiller MacKay Collegiate Institute (KMCI, Keiller MacKay) is a medium-sized public high school building located in Toronto's west end close to the intersection of Islington Avenue and Highway 401. Opened in 1971 until closing in 1983, it was overseen by the Etobicoke Board of Education, which was joined with other school boards in the Toronto area during the city's amalgamation to form what is now the Toronto District School Board.