Riverdale Collegiate Institute (also called Riverdale CI, RCI, or Riverdale) is a non-semestered high school located in Toronto, Ontario, Canada owned and operated by the Toronto Board of Education until its merger in 1998 into the Toronto District School Board. It is a selective school, that only accepts students in regular program who are going from grade 8 to grade 9 and live in the school district. Students must apply by March 1 of their grade 8 year to be eligible for admittance.