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Incorporated in 1944, TORONTO was the eighth IIA Chapter to be formed and is currently the second largest in the world with over 2,800 members. The Toronto Chapter represents not only Members of the IIA in the Greater Toronto Area, but it also represents Members of the IIA that reside in South-western Ontario, Northern Ontario, and parts of Eastern Ontario.​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​​