United States Ambassador to South Vietnam
At the end of World War II in Asia, France attempted to regain control of Vietnam, as part of French Indochina, which it had lost to Japan in 1941. Following the First Indochina War, the country was split into two parts, the North and the South. The southern part was named the State of Vietnam under the leadership of Bảo Đại. In 1950, the United States recognized the Bảo Đại government, established diplomatic relations, and sent its first ambassador to Saigon in South Vietnam, officially known as the Republic of Vietnam following the rise of Ngô Đình Diệm in 1955. The US was opposed to the communist government of the North, led by Hồ Chí Minh, and did not recognize the northern regime.
Following the Vietnam War, the US Embassy in Saigon was closed and all Embassy personnel evacuated on April 29, 1975, just prior to the Fall of Saigon to North Vietnamese and Việt Cộng forces.Ambassadors
Portrait | Name | Type | Title | Appointed | Presented credentials | Terminated mission |
| Donald R. Heath | Career FSO | EE/MP | June 29, 1950 | October 22, 1950 | June 25, 1952 |
| Donald R. Heath | Career FSO | AE/P | June 25, 1952 | July 11, 1952 | November 14, 1954 |
| G. Frederick Reinhardt | Career FSO | AE/P | April 20, 1955 | May 28, 1955 | February 10, 1957 |
| Elbridge Durbrow | Career FSO | AE/P | March 14, 1957 | April 16, 1957 | May 3, 1961 |
| Frederick E. Nolting Jr. | Career FSO | AE/P | March 15, 1961 | May 10, 1961 | August 15, 1963 |
| Henry Cabot Lodge Jr. | Political appointee | AE/P | August 1, 1963 | August 26, 1963 | June 28, 1964 |
| Maxwell D. Taylor | Political appointee | AE/P | July 1, 1964 | July 14, 1964 | July 30, 1965 |
| Henry Cabot Lodge Jr. | Political appointee | AE/P | July 31, 1965 | August 25, 1965 | April 25, 1967 |
| Ellsworth F. Bunker | Political appointee | AE/P | April 5, 1967 | April 28, 1967 | May 11, 1973 |
| Graham A. Martin | Career FSO | AE/P | June 21, 1973 | July 20, 1973 | April 29, 1975 |
Deputy Ambassadors