Toni Onley, born Norman Antonio Onley (20 November 1928 - 29 February 2004), was a Douglas-born painter who trained at the Douglas School of Fine Arts before emigrating to Canada in 1948, where he became one of the country's leading watercolourists, celebrated for landscapes of Canada's northern and western coastlines. He was elected to the Canadian Society of Painters in Water Colour and the Royal Canadian Academy of Arts, and was appointed an Officer of the Order of Canada in 1999. He died in a plane crash near Maple Ridge, British Columbia, in 2004.