McKinnon Park Secondary School is a high school in the town of Caledonia, Ontario. It replaced Caledonia High School for the school year 1992/1993, which was converted into River Heights Public School. The school contains a gymnasium, cafeteria, workshop, library, day care centre, and three computer labs. There is a greenhouse in a courtyard located in the east quad. The surrounding grounds contain a baseball field, a soccer fields and a football field with a track surrounding it. The fields are used by youth soccer teams during the sport seasons. The school is in close proximity to the new arena/library and baseball diamond. It temporarily served as a home to the new population of River Heights Public School during in fall 1991 while renovations and an expansion were created, it also held a church congregation as their church was being built.
The 2009-2010 academic year saw over 900 students enrolled.