Niagara-on-the-Lake (Cayuga: Tganawai:ˀ) (2011 population 15,400) is a Canadian town located in Southern Ontario where the Niagara River meets Lake Ontario in the Niagara Region of the southern part of the province of Ontario. It is located across the Niagara River from Youngstown, New York, US. It is the only town in Canada that has a Lord Mayor.