Dundas /ˈdʌnˌdæs/ is a formerly independent town and now constituent community in the city of Hamilton, Ontario, Canada. It is nicknamed the Valley Town because of its topographical location at the bottom of the Niagara Escarpment on the Western edge of Lake Ontario. The population has been stable for decades at about twenty thousand, largely because it has not annexed rural land from the protected Dundas Valley Conservation Area.