Graham Anderson Martin was an American diplomat. He was the ambassador to Thailand and as U.S. representative to SEATO from 1963 to 1967, ambassador to Italy from 1969 to 1973 and the last United States Ambassador to South Vietnam from 1973 until his evacuation during the Fall of Saigon in 1975.

The United States Embassy in Saigon was first established in June 1952, and moved into a new building in 1967 and eventually closed in 1975. The embassy was the scene of a number of significant events of the Vietnam War, most notably the Viet Cong attack during the Tet Offensive which helped turn American public opinion against the war, and the helicopter evacuation during the Fall of Saigon after which the embassy closed permanently.