Ralph Anthony Dungan (April 22, 1923 – October 5, 2013) was an American diplomat and ambassador from the United States to Chile from December 10, 1964, to August 2, 1967.

During World War II, he served in the U.S. Navy as a flight instructor and then attended Saint Joseph's University in Philadelphia under the G.I.

His assignments in the Kennedy years included service on a task force on foreign aid, handling White House African Affairs and then, finally, handling White House Latin American Affairs, which was his specialty and which he later turned into an ambassadorship during the Johnson Administration.

However, then President of Rutgers, Edward J. Bloustein, said of former Ambassador Dungan in 1975: "He's a nice guy, but he does not understand the nature of universities.

Dungan died at his home in Saint John, Barbados, according to his death notice, at the age of 90, due to complications following surgery.