Robert Halsey Pelletreau Jr. (born July 9, 1935) is an American former diplomat who was United States Ambassador to Bahrain (1979–1980), Tunisia (1987–1991), and Egypt (1991–1993), as well as the former Assistant Secretary of State for Near Eastern Affairs.

After graduating from Yale University (B.A., 1957), he served in the United States Navy Reserve from 1957 to 1958.

From 1973 to 1975 Ambassador Pelletreau was a Political Officer in Algiers, Algeria; and served in several capacities in Jordan, Lebanon, Mauritania and Morocco.

He became the Deputy Assistant Secretary of Defense for Near East and South Asia at the Pentagon, 1980–1981.

He appeared before the Subcommittee on Europe and the Middle East of the House Foreign Affairs Committee on September 26, 1983, addressing Major U.S.