In 1844, William Gamble, a miller on the Humber River and the first Reeve of Etobicoke, donated this site on the shoreline of prehistoric Lake Iroquois to the local Church of England congregation. On October 17, 1847, the church, a simple, lofty spired structure designed by William Tyrrell of Weston, was dedicated by The Rt. Reverend John Strachan, first Bishop of Toronto. In 1894, under the guidance of Ford Howland, the plaster exterior of the church was bricked and buttressed and the Tyrrell spire retained. St. George's is the only historic church in Etobicoke whose original building is incorporated within the present structure.