List of United States ambassadors to Italy

Ambassador of the United States to Italy
Seal of the United States Department of State
Incumbent Kelly Degnan (acting) since January 20, 2017
Nominator	The President
Inaugural holder	John Nelson as Chargé d'Affaires
Formation	October 24, 1831
Website	U.S. Embassy – Rome

Since 1840, the United States has had diplomatic representation in the Italian Republic and its predecessor nation, the Kingdom of Italy, with a break in relations from 1941 to 1944 while Italy and the U.S. were at war during World War II. The U.S. Mission to Italy is headed by the Embassy of the United States in Rome, and also includes six consular offices.

Beginning in 2006, the U.S. Ambassador to Italy is concurrently accredited as the U.S. Ambassador to San Marino.

Listed below are the head U.S. diplomatic agents in Italy, their diplomatic rank, and the effective start and end of their service in Italy.

The Embassy at Naples closed November 6, 1860.

Diplomatic relations were severed and the U.S. Embassy in Rome was closed on December 11, 1941, after Italy declared war on the United States. Diplomatic relations were reestablished on October 16, 1944. Ambassador Alexander C. Kirk reopened the U.S. Embassy in Rome when he presented his credentials on January 8, 1945.