Dundalk, first called McDowell's Corners, was originally located on the Toronto-Sydenham Road, but moved about a mile to the west to be closer to the Toronto Grey and Bruce railway when it went through in the 1870s. Dundalk was incorporated as a village in 1887. On January 1, 2000, it was amalgamated with the Township of Proton and the Township of Egremont to form the Township of Southgate, in the southeast corner of Grey County. The mayor of Southgate is Briane Milne.