Ontario is a province of Canada that has established several official emblems and symbols to reflect the province's history, natural resources, and its people. In addition to official symbols, several other emblems and symbols exist that are commonly associated with the province.

The coat of arms of Ontario is the armorial emblem representing the Canadian province of Ontario. The arms contain symbols reflecting Ontario's British heritage, along with local symbols. At the upper part of the shield is the red cross of St. George, representing England. The lower portion of the shield features three golden maple leaves on a green background.