President Donald Trump has signed an executive order directing the U.S. government to rename Lake Ontario as “Lake America”—a change federal agencies must now carry onto American maps and documents even as Canada rejects it.
The August 27 order gives the Interior Department and the U.S. Board on Geographic Names 30 days to update the Geographic Names Information System and remove references to Lake Ontario from federal use. It describes the lake as an economic and strategic asset and cites American spending on Great Lakes protection and icebreaking.
The order cannot require Canada, private mapmakers or international organizations to adopt the new name. Lake Ontario is shared by New York and the Canadian province of Ontario, and its established name comes from an Indigenous Wendat word generally associated with a great or beautiful lake.
Canadian Prime Minister Mark Carney rejected the change, and New York officials joined the backlash. Reuters reported that the move arrived amid deteriorating U.S.-Canada trade relations and retaliatory tariffs.
For now, one body of water may carry two labels depending on which side of the border—or which map—you are using. The federal name change is real; universal acceptance is another matter entirely.
Facts first. Side-eye included.
DJF separates what is confirmed from what is claimed—and tells you why this particular mess is worth your time.