Robert C. Barber is an American attorney and diplomat who served as United States Ambassador to Iceland in the Obama administration.

[1] After graduating from law school, Barber served as an assistant district attorney for New York County from 1977 to 1981.

Ambassador to Iceland on October 30, 2013, succeeding career United States Foreign Service officer, Luis E. Arreaga.

After a delay, Barber was confirmed on December 12, 2014 and presented his credentials to the president of Iceland, Ólafur Ragnar Grímsson on January 28, 2015.

Barber resumed his legal career in 2017 and joined Prince Lobel as a corporate attorney.