Ontario (disambiguation)

Ontario is the most populous province in Canada.

Ontario may also refer to:

Places

Canada

• Ontario County, Ontario, the name of several historic counties
• Ontario (electoral district), Federal electoral district, 1925 - 1996

United States

• Ontario, California
• Ontario, Illinois
• Ontarioville, Illinois
• Ontario, Indiana
• Ontario, Iowa
• Ontario, New York
• Ontario County, New York
• Ontario, Ohio
• Ontario, Oregon
• Ontario, Pennsylvania
• Ontario, Virginia
• Ontario, Wisconsin

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, of shape and size similar to Lake Ontario

Computer viruses

• Ontario (computer virus) (Ontario.512)
• Ontario.1024 (computer virus)
• Ontario.2048 (computer virus)

Other uses

• USS Ontario, American naval vessel
• HMCS Ontario (C53), Canadian naval vessel
• HMS Ontario (1780), British warship sunk during the American Revolution
• Ontario International Airport (ONT) in Ontario, California
• Ontario Motor Speedway, a 2.5-mile racetrack in Ontario, California
• Ontario (processor), a computer APU from AMD