President Trump signs executive order to rename Lake Ontario to Lake America

(CNN, KYMA) - President Donald Trump signed an executive order Thursday to change the name of Lake Ontario to "Lake America."

President Trump said his name change for one of the five Great Lakes is "effective immediately."

The lake is bordered by Canada's Ontario Province to the north and west, and New York state to the south and east.

Canada's most populous city, Toronto, is on the lake's Canadian shore.

Trump's renaming action comes amid renewed bad blood between the U.S. and Canada over trade matters.

The president took aim at Canada Thursday, saying their officials have treated the U.S. "very badly."

Canadian officials earlier took the stance that they would ignore any action by Trump to rename the lake.

The president took a similar action with the Gulf of Mexico.

Early in 2025, the Board of Geographic Names formally changed the body of water's name to Gulf of America.

However, Mexico and the rest of the international community continues to refer to it as the Gulf of Mexico.