Toronto is the largest city in Canada and is located on the northwestern shore of Lake Ontario. It has a population of over 2.7 million people and is the capital of the province of Ontario. Oswego is a city located on the southeastern shore of Lake Ontario in the U.S. state of New York. It has a population of around 18, 000 people and is the county seat of Oswego County. Both Toronto and Oswego are cities located on Lake Ontario.