| Robert South Barrett IV | |
| Office: | 4th United States Ambassador to Djibouti |
| Term Start: | September 5, 1988 |
| Term End: | April 18, 1991 |
| Predecessor: | John Pierce Ferriter |
| Successor: | Charles R. Baquet III |
| Death Place: | MedStar Georgetown University Hospital, Washington, D.C., U.S. |
| Death Cause: | Cancer |
| Nationality: | American |
| Education: | Princeton University (AB) University of Wisconsin–Madison |
| Profession: | Diplomat |
Robert South Barrett IV (1927 – December 24, 2004) was an American Career Foreign Service Officer who served concurrent appointments as Chargé d'Affaires ad interim to Madagascar and Comoros (1977-1980) and was Ambassador Extraordinary and Plenipotentiary to Djibouti (1988-1991).[1] He also served as “Consul in Martinique, political officer in war-torn Vietnam, ... and Deputy Chief of Mission in conflict-ravaged Beirut, with a relatively peaceful interim tour at the United Nations in New York, before accepting the post of Ambassador to Djibouti, a country of great strategic importance to the United States”[2]
Barrett graduated with an AB was in politics from Princeton University and a master's in economics from the University of Wisconsin–Madison.
A resident of Washington, D.C. and Charleston, South Carolina, Barrett died of cancer at Georgetown University Hospital.[3]