Agincourt Collegiate Institute

Agincourt Collegiate Institute, formerly known as Agincourt High School and Agincourt Continuation School is a secondary school located in Agincourt, a neighbourhood in the Scarborough area of Toronto, Ontario, owned and operated by the Toronto District School Board that was sanctioned by the Scarborough Board of Education prior to amalgamation in 1998.

A.C.I is one of the oldest surviving secondary high schools in the former Scarborough in the north, the other being R. H. King Academy in the south.