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 HMS Ontario
- A variety of apple, see Ontarioapfel
- A grape variety, see Ontario ( grape )
- A knife manufacturer, see Ontario (knife manufacturer)
- A Methansee on Saturn's moon Titan, see Ontario Lacus
- Disambiguation