Leeds was a federal electoral district represented in the House of Commons of Canada from 1904 to 1979. It was located in the province of Ontario. This riding was first created in 1903 from parts of Leeds North and Grenville North and Leeds South ridings. It 1914, it was redefined to consist of the whole county of Leeds, including the town of Brockville. In 1966 it added the Townships of North Burgess, North Elmsley and Montague excepting the Village of Merrickville from Lanark County.