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