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(EN Wikipedia)
Ontario is the most populous province in Canada.
Ontario may also refer to:
United States
Ontario, California
Ontario, Illinois
Ontarioville, Illinois
Ontario, Indiana
Ontario, Iowa
Ontario, New York, a town in Wayne County, New York.
Ontario (CDP), New York, a hamlet and census-designated place in Wayne County, New York.
Ontario County, New York
Ontario, Ohio
Ontario, Oregon
Ontario, Pennsylvania
Ontario, Virginia
Ontario, Wisconsin
QED