Trump Renames Lake Ontario ‘Lake America’ as Canada Trade War Escalates
WASHINGTON, UNITED STATES — WEB DESK: US President Donald Trump has signed an executive order directing the federal government to refer to Lake Ontario as “Lake America,” turning a centuries-old geographic name into the latest flashpoint in an escalating trade dispute between Washington and Ottawa.
The order, signed on Thursday, August 27, changes the name for US federal government purposes. It does not require Canada, international organisations, state governments or other institutions to adopt “Lake America.”
That distinction is crucial because Lake Ontario is an international body of water shared by the United States and Canada. Roughly 47% of the lake lies within the United States, according to reporting on the executive order.
What Does Trump’s Order Actually Change?
Trump directed Interior Secretary Doug Burgum and the Department of the Interior to update the US Geographic Names Information System (GNIS) within 30 days.
Federal government references to the lake are expected to use “Lake America” under the order.
The change, however, does not internationally rename Lake Ontario.
Canada remains free to continue using Lake Ontario, while other governments, international organisations, mapping services and institutions are not automatically bound by Trump’s executive action.
This means headlines saying Trump has universally “renamed Lake Ontario” require qualification: the order establishes the new designation for US federal usage, rather than giving Washington unilateral authority over what the entire world calls the shared lake.
Canada Rejects ‘Lake America’
Canadian Prime Minister Mark Carney responded quickly, saying the lake would continue to be called Lake Ontario in Canada.
Carney stressed that the name is more than 400 years old, predating both Canadian Confederation and the US Declaration of Independence.
The name has Indigenous roots. Carney pointed to the Wendat word “Ontari’io,” from which the modern name is derived.
New York Governor Kathy Hochul also rejected the change, adding opposition from the US side of the border. Reuters reported that both Carney and the Democratic New York governor said they would continue using the historic name.
Name Change Comes Amid US-Canada Tariff War
The executive order comes against the backdrop of a rapidly escalating trade confrontation between two countries whose economies have historically been deeply integrated.
Washington recently imposed 50% tariffs on about $20 billion worth of Canadian imports after trade negotiations collapsed.
Canada subsequently announced dollar-for-dollar retaliatory measures covering about $20 billion in annual US imports.
Ottawa’s counter-tariffs, ranging from 15% to 50% across roughly 700 products, are scheduled to take effect on September 8.
The naming dispute therefore carries limited direct economic significance but has become a highly visible symbol of deteriorating relations between Washington and Ottawa.
Trump Had Threatened Change Days Earlier
Trump had publicly floated the idea earlier in the week, saying the United States was considering changing the name because of its worsening commercial relationship with Ontario.
He subsequently posted altered maps showing “Lake America” before formalising the move through an executive order.
The move follows Trump’s earlier decision to direct US federal agencies to use “Gulf of America” for the Gulf of Mexico, a change ordered after he returned to the White House in 2025.
During Thursday’s Oval Office event, Trump also raised the prospect of eventually turning his attention to the names of larger bodies of water, including an ocean.
Lake Ontario Remains Internationally Shared
Lake Ontario is the easternmost and smallest by surface area of North America’s five Great Lakes. It lies between New York State and the Canadian province of Ontario and forms part of the broader Great Lakes-St Lawrence water system.
The executive order therefore creates an unusual naming situation: US federal agencies are being instructed to use Lake America, while Canada continues to recognise the centuries-old name Lake Ontario.
For international reporting, “Lake Ontario” remains the clearest neutral geographic reference, with “Lake America” appropriately identified as the Trump administration’s new US federal designation.
