United States Ambassador to Portugal

Ambassador of the United States to Portugal
Seal of the United States Department of State
Incumbent Herro Mustafa Chargé d'Affaires a.i since January 20, 2017
Nominator	President of the United States
Inaugural holder	David Humphreys as Minister Resident
Formation	February 21, 1791
Website	U.S. Embassy - Lisbon

This is a list of Ambassadors of the United States to Portugal.

Bilateral diplomatic relations between the United States and Portugal date from the earliest years of the United States. Following the Revolutionary War, Portugal was the first neutral country to recognize the United States. On February 21, 1791, President George Washington opened formal diplomatic relations, naming Col. David Humphreys as U.S. Minister Resident. Subsequent envoys were given the title Minister Plenipotentiary.

U.S. diplomatic terms