Ontario (disambiguation)
Ontario designated
- a province in Canada, see Ontario
- an administrative unit in the state of New York, see Ontario County
- Places in the United States:
- Ontario (Illinois)
- Ontario, Indiana
- Ontario, Iowa
- Ontario (California)
- Ontario (Kansas)
- Ontario (New York)
- Ontario (Ohio)
- Ontario, Oklahoma
- Ontario (Oregon)
- Ontario, Pennsylvania
- Ontario (Virginia)
- Ontario, Wisconsin , in Vernon County
- Ontario Beach (New York)
- Ontario Center (New York)
- Ontario Heights (Oregon)
- Ontario on the Lake (New York)
- a lake, see Lake Ontario
- a historic British sailing ship, see Ontario (ship)
- an apple variety, see Ontario apple
- a grape variety, see Ontario (grape variety)
- a type of tomato, see Ontario (tomato)
- a knife manufacturer, see Ontario (knife manufacturer)
- a methane lake on Saturn's moon Titan, see Ontario Lacus
