The flag of Ontario was enacted by the Flag Act on May 21, 1965 in the Legislature of the Province of Ontario. The flag is a defaced Red Ensign, with the United Kingdom of Great Britain and Northern Ireland's Union Flag in the canton and the Ontario shield of arms in the fly.

In 1964, the federal government, after a long and acrimonious debate, replaced the Canadian Red Ensign with the current flag of Canada. This decision was unpopular among millions of Canadians. These included many Ontarians, particularly in rural areas that made up much of the political base of Premier John Robarts' Ontario Progressive Conservatives. Robarts thus proposed that Ontario would have its own flag and that it would be a Red Ensign like the previous Canadian flag. While Robarts insisted that he supported the new national flag, he felt the Ensign was an important symbol that reflected Ontario's British heritage and the sacrifices made by Canadian troops under the Red Ensign.

Proposals for a New Ontario Province Flag[edit | edit source]

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