On Thursday, August 27th, 2026, President Donald Trump signed an executive order officially renaming Lake Ontario to "Lake America." The order directs federal agencies in the United States to adopt the new name on maps, documents, and databases immediately.

The move comes amid an escalating trade war between the United States and Canada. Trump stated in the Oval Office that the name change is "official, effective immediately," and that he had "filed all the necessary papers, documents, everything else" for the change. He added, "We notified all of the various people that we have to notify. So we’ve done everything that you have to do."

The executive order claims that "the deepest parts of the Lake’s waters lie within United States territory," and that the U.S. "claims most of the Lake’s volume," emphasizing the lake's importance to American exploration, settlement, commerce, and defense.

When asked about the message this renaming sends to Canada, Trump said, "No message," but also remarked, "They don’t pay for anything, and they want to be treated like a state, but they’re not a state."

However, the renaming applies only within the United States. Trump has no authority to rename the Canadian portion of the lake or compel Canada, international legal bodies, or international mapmakers to adopt the new name. Canadian officials and commentators have maintained that the lake remains Lake Ontario. As Isaacs stated, "The Americans can call it whatever they want to call it. It is Lake Ontario."

This symbolic renaming highlights ongoing tensions in U.S.-Canada relations amid trade disputes.

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