Last month, President Donald Trump issued an executive order redesignating Lake Ontario, the freshwater lake bordering New York state and the Canadian province of Ontario, as "Lake America." The move came amid heightened trade tensions between the United States and Canada, following failed tariff negotiations and the imposition of new duties. Similar to a prior order renaming the Gulf of Mexico as the Gulf of America, the latest directive applies only to U.S. federal agencies and carries no binding effect for Canada or other international parties.
The renaming has stirred a mix of reactions. Canadian Prime Minister Mark Carney publicly expressed disapproval, highlighting the importance of established hydronyms—names of bodies of water—and their cultural significance. Reuben Rose-Redwood, a geography professor at the University of Victoria, described the U.S. action as largely provocative, characterizing it as “rage-baiting and trolling Canadians.” He noted that while the Lake Ontario controversy lacks the deep geopolitical resonance of long-standing naming disputes, such changes carry historical weight, as place names have historically been used by colonial powers to assert control over territories.
The international community has no single authority to adjudicate naming disputes, although the United Nations Group of Experts on Geographical Names works to promote standardization. Mark Iliffe, a geographer with the U.N. group, emphasized that names are tied closely to identity and sense of place, and serve practical functions in international agreements and emergency response coordination. However, naming controversies can endure due to conflicting territorial claims and historical narratives.
This dispute over Lake Ontario joins a number of other well-known geographical naming conflicts worldwide. The body of water between the Korean Peninsula and Japan is called the Sea of Japan by Japan, the East Sea by South Korea, and the Korean East Sea or East Sea of Korea by North Korea. The International Hydrographic Organization, tasked with standardizing marine nomenclature, has avoided taking sides, often opting to use numerical identifiers.
Similar tensions exist over the naming of the Persian Gulf, which Iran and much of the international community recognize as such, while several Arab nations promote the alternative name Arabian Gulf, a designation that gained prominence during the Pan-Arab nationalist movement of the mid-20th century. Additionally, the waters south of China, claimed by several countries in the region, are known internationally as the South China Sea, but the Philippines refers to part of these waters as the West Philippine Sea. This dispute relates to overlapping territorial claims involving China, Taiwan, Vietnam, Malaysia, Brunei, Indonesia, and the Philippines.
Names of geographical features often reflect complex historical, political, and cultural disputes. While the U.S. effort to rename Lake Ontario appears largely symbolic, it illustrates how place names remain intertwined with national identity and diplomatic relations.