On Thursday, President Donald Trump enacted an executive order to rename Lake Ontario as "Lake America," marking the latest escalation in his ongoing trade conflict with Canada.
Surrounded by maps of the Great Lakes in the Oval Office, Trump signed the order, stating he had long considered the name change and declared it "official and effective immediately."
"We're officially renaming Lake Ontario to Lake America right now as I sign this order," Trump proclaimed, according to a video shared on his Truth Social account.
The President even hinted at possibly renaming oceans. "We have a gulf and now a lake. All that's left is an ocean, so maybe we'll rename the Atlantic or Pacific, or perhaps both," he mused, though no formal action was announced.
The executive order justifies this change with economic and strategic reasons: it states that the deepest parts of the lake are on American soil, that the U.S. operates nine of the eleven icebreakers in the Great Lakes, and that Washington has invested nearly $4 billion over the past decade to protect this freshwater ecosystem, contrasting with a "much smaller" Canadian contribution.
A White House advisor at the signing was clear: "Most of the lake's volume is within the United States. The deepest sections are on U.S. territory, so this reflects that it's an American lake."
The decree directs the Secretary of the Interior to coordinate with the Board on Geographic Names within 30 days to update the Geographic Names Information System and remove all federal references to the original name.
This measure, however, has only federal reach: it mandates U.S. government agencies but holds no legal power over Canada, states, private companies, or international bodies.
When asked about his persistent provocation of U.S. allies, Trump did not hold back: "Canadian officials have treated us very poorly. They're unpleasant people," he said, labeling them "the worst to deal with in trade matters" and calling them "arrogant."
The Canadian response was swift and firm. Industry Minister Mélanie Joly stated unequivocally: "We will always call it Lake Ontario. Period." Ontario Premier Doug Ford, who days earlier had labeled Trump a "dictator" and "bully," dismissed the proposal as "a lot of rhetoric" and assured that his province would not "give in."
Experts also challenged the historical premise of the decree. Researcher Daniel Macfarlane from Western Michigan University noted that the name "Ontario" derives from the Iroquois word "oniatarí:io," meaning "lake of shining waters" or "great lake," predating the province by centuries. "I laughed out loud and facepalmed... because it's simply ridiculous," he remarked.
The renaming follows the precedent of Trump's threat just two days earlier on Truth Social.
It also mirrors the logic of Executive Order 14172 from January 20, 2025, which previously renamed the Gulf of Mexico to the "Gulf of America," prompting Google, Apple, and Microsoft to adjust their maps.
The backdrop is an intensifying trade war that worsened after bilateral negotiations failed on August 22, leaving in place tariffs of 50% on Canadian imports worth about $20 billion.
Canada retaliated with equivalent measures on U.S. goods, effective September 8, and a $7.5 billion Canadian aid package for affected workers.
Impact of Lake Renaming and Trade Disputes
What prompted Trump to rename Lake Ontario?
The renaming of Lake Ontario as "Lake America" is part of Trump's strategy to escalate trade tensions with Canada, underscored by economic and strategic claims about U.S. investments and control over the lake.
How has Canada reacted to the lake renaming?
Canada, with strong responses from officials like Mélanie Joly and Doug Ford, has rejected the renaming as mere rhetoric and insists on continuing to call it Lake Ontario.
What are the broader implications of the U.S.-Canada trade dispute?
The trade dispute has led to significant tariffs on both sides, affecting billions in trade and prompting Canada to implement a $7.5 billion aid package for impacted workers.