President Trump's August 27, 2026, executive order directed federal agencies to rename Lake Ontario "Lake America" in U.S. records within 30 days, citing the lake's role in American commerce and infrastructure amid escalating U.S.-Canada trade disputes. The Geographic Names Information System updated its database shortly afterward on August 29. Google Maps follows a longstanding practice of reflecting GNIS changes for U.S. users while showing alternate official names by region or both labels internationally, as it did after the 2025 Gulf of America rename. Google's official blog confirmed the update is beginning to roll out, with U.S. devices expected to display "Lake America" and Canadian devices retaining "Lake Ontario." Polymarket contracts assess the timing of this label change for the majority of U.S. users, with later-year resolutions reflecting the company's policy and precedent.