Lake Ontario

Lake Ontario is one of the five Great Lakes of North America. It is bounded on the north, west, and southwest by the Canadian province of Ontario, and on the south and east by the U.S. state of New York. The Canada–United States border spans the centre of the lake.

The Canadian cities of Hamilton, Kingston, Mississauga, and Toronto are located on the lake's northern shorelines, while the Canadian city of St. Catharines and the American city of Rochester are located on the south shore. In the Huron language, the name Ontarí'io means "great lake". Its primary inlet is the Niagara River from Lake Erie. The last in the Great Lakes chain, Lake Ontario serves as the outlet to the Atlantic Ocean via the Saint Lawrence River, comprising the western end of the Saint Lawrence Seaway. The Long Sault control dam, primarily along with the Moses-Saunders Power Dam regulates the water level of the lake.