​SMITH'S FALLS, a town and outport of Lanark county, Ontario, Canada, on the Rideau river and canal, and the Canadian Pacific railway, 28 m. N.W. of Brockville, Pop. (1901) 5155. It contains saw, shingle, woollen and planing mills, and large agricultural implement works, and has regular steamer connexion with Kingston and Ottawa by the Rideau river and canal.