William George Storm (1826–1892) was a Canadian architect who designed a number of prominent monuments in Toronto, Ontario. He was born in England and immigrated to Canada while still a child and was raised in Cobourg, Ontario. His father was a contractor and introduced him to the building trade. He apprenticed first under William Thomas and then under Frederick William Cumberland. Storm and Cumberland eventually formed a partnership, and the firm became one of the most prominent in nineteenth century Toronto. The firm won many of the city's most important commissions, including expanding Osgoode Hall, the chapel of St. James-the-Less, the tower of St. James Cathedral, and University College.