Monsignor Doyle Catholic Secondary School is a public, Catholic High School in Cambridge, Ontario, Canada which opened in 1976 as a junior high school, and is the second smallest Catholic secondary school of the Waterloo Catholic District School Board. In the mid-1980s, Catholic education received full funding and all the Catholic junior high schools in Waterloo Region converted to high schools teaching grades 9 - 12 and OAC. School teams are known as the "Doyle" Mustangs and are known for their exceptional performance in Badminton, Wrestling, Track & Field, Soccer, and Volleyball.