List of United States Ambassadors to Canada

Ambassador of the United States to Canada Ambassadeur des États-Unis au Canada
Seal of the United States Department of State
Incumbent Elizabeth Moore Aubin (Chargé d'affaires ad interim) since January 18, 2017
Residence	Lornado
Nominator	The President
Term length	No Fixed Term
Inaugural holder	William Phillips as Envoy Extraordinary and Minister Plenipotentiary
Formation	June 1, 1927
Website	U.S. Embassy - Ottawa

This is a list of ambassadors from the United States to Canada. The ambassador is the head of the Embassy of the United States in Ottawa.

Prior to 1943, the head of the U.S. diplomatic mission to Canada bore the title of Envoy Extraordinary and Minister Plenipotentiary. The U.S. mission to Canada was upgraded from legation to embassy status in June 1943, and Ray Atherton was the first chief of mission to hold ambassadorial rank.