Keiller MacKay Collegiate Institute (KMCI, Keiller MacKay) was a medium-sized former public high school located in Toronto's west end close to the intersection of Islington Avenue and Highway 401. When it was open, 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.