List of ambassadors of the United States to Canada
| Ambassador of the United States to Canada | |
|---|---|
| Ambassadeur des États-Unis au Canada | |
Seal of the United States Department of State | |
Flag of a United States ambassador | |
since April 29, 2025 | |
| United States Department of State | |
| Reports to | United States Secretary of State |
| Residence | Lornado |
| Seat | Embassy of the United States Ottawa, Ontario, Canada |
| Appointer | President of the United States with Senate advice and consent |
| Term length | At the pleasure of the president |
| 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 of 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; Ray Atherton was the first chief of mission to hold ambassadorial rank.