Ontario is a province in east-central Canada.
Ontario may also refer to:
Places Belize Ontario, Belize, a village in Cayo District, Belize
Canada Ontario County, Ontario, the name of several historic counties Ontario (federal electoral district), a defunct federal electoral district Ontario (provincial electoral district), a defunct provincial electoral district Ecclesiastical Province of Ontario, an Anglican province
United States Ontario, California Ontario, Illinois Ontario, Indiana Ontario, Iowa Ontario, New York Ontario (CDP), New York Ontario County, New York Ontario, Ohio Ontario, Oregon Ontario, Wisconsin Ontario Township (disambiguation)
Lakes Lake Ontario, one of the Great Lakes on the boundary between the Canadian province of Ontario and the U.S. state of New York Ontario Lacus, a dark feature near the south pole of Saturn's moon Titan
Ships , several Canadian naval vessels
, several British naval vessels , British warship sunk during the American Revolution , several American naval vessels
Other uses Ontario (computer virus) Ontario (processor), a computer APU from AMD Ontario International Airport (ONT) in Ontario, California Ontario Motor Speedway, a 2.5-mile racetrack in Ontario, California 45554 Ontario, a British LMS Jubilee Class locomotive Ontario Bus Industries, the former name of Canadian bus manufacturer Orion Bus Industries
See also Ontarioville, Illinois