The ambassador from Luxembourg to the United States is the Grand Duchy of Luxembourg's foremost diplomatic representative in the United States of America, and in charge of Luxembourg's diplomatic mission in the United States.
In addition, the ambassador serves concurrently as the non-resident ambassador to Canada, non-resident ambassador to Mexico, and permanent observer to the Organization of American States, all of which are ambassadorial positions in their own right.
The embassy is in Washington DC, and was opened by the government in exile in 1940.