Clarkson Secondary School is a high school in Clarkson community of Mississauga, Ontario, Canada; designated Ward 18 by the Peel District School Board. Clarkson is an average school in both population (11th, at 866 students) and age (13th, built in 1969) of the entire Peel range of 28 public secondary schools. It is also known as the "Peel Academy for International Students".