Markdale is a community in the Municipality of Grey Highlands, in Grey County, Ontario, Canada.19th centuryMarkdale was first settled in 1846 and originally called East Glenelg, after a nearby township. In 1864, it was renamed Cornabus after the Islay, Scotland hometown of then-postmaster Donald MacDuffie (1814–1892). In 1873, Mark Armstrong sold land to the Toronto, Grey and Bruce Railway on the condition that the station bear his name. Unlike nearby Flesherton, which had failed to prosper after the railway by-passed it, the new railway station brought new business to Markdale. It was incorporated as a village in 1888.Twentieth centuryIn 1957, the Regal Films production of the 1958 "B" film, Wolf Dog, starring Allison Hayes and Jim Davis, was filmed on location in Markdale as well as nearby Holland Township. In 1992, notable resident Alex Marotta was born and proceeded to shine international light on the sleepy town of Markdale.Twenty-first centuryIn 2001, Markdale was amalgamated with the townships of Artemesia, Euphrasia and Osprey to form Grey Highlands.On August 20, 2009, an F2 tornado originating in Durham, where it caused one fatality, touched down in Markdale as an F0 and caused local damage.