President Donald Trump signed an executive order on August 27, 2026, to rename Lake Ontario as "Lake America," a decision made amid escalating trade tensions between the United States and Canada. The Great Lake, which lies on the U.S.-Canada border, has long been recognized by its original name. Trump's move arrives after a breakdown in trade negotiations between Washington and Ottawa, which sparked a renewed trade war characterized by retaliatory tariffs on billions of dollars of goods.

This is not the first time Trump has attempted to rename an international body of water for symbolic effect; in January 2025, he issued a similar order to rename the Gulf of Mexico as the "Gulf of America." Despite the U.S. government's actions, Canada has firmly rejected the renaming of Lake Ontario and will continue to refer to it by its traditional name. Canadian Prime Minister Mark Carney emphasized that the name will remain Lake Ontario, highlighting the resilient stance of Canada in the face of such unilateral decisions.

The origins of Lake Ontario's name trace back to the Iroquoian term "oniatarí:io," meaning "lake of shining waters," and it is the easternmost of the five Great Lakes, forming a major freshwater system shared by the two countries. The recent trade conflict began when President Trump imposed 50% tariffs on approximately $20 billion worth of Canadian products, prompting Canada to announce matching tariffs scheduled to take effect in early September. Although Canada moderated some tariffs on seafood to prevent broader economic fallout, the dispute continues to strain relations.

Trump dismissed concerns that the trade conflict would raise costs for American consumers, asserting that the U.S. faces an unfair trade deficit with Canada. He labeled Canada as a country that "doesn't pay for anything" and likened its status to that of a U.S. state, despite its sovereign nationhood. The renaming of Lake Ontario serves as a provocative gesture underscoring the deteriorating relationship between the two neighbors, drawing criticism from some Democratic leaders who mockingly responded with symbolic renamings of their own.