Robert C. Hill

As an article published in The Nation in October 1987 noted: "'Hill was shaken, he became very disturbed, by the case of the son of a thirty-year embassy employee, a student who was arrested, never to be seen again,' recalled former New York Times reporter Juan de Onis. 'Hill took a personal interest.' He went to the Interior Minister, a general with whom he had worked on drug cases, saying, 'Hey, what about this? We're interested in this case.' He questioned (Foreign Minister Cesar) Guzzetti and, finally, President Jorge R. Videla himself. 'All he got was stonewalling; he got nowhere.' de Onis said. 'His last year was marked by increasing disillusionment and dismay, and he backed his staff on human rights right to the hilt."

In Argentina, the five-time conservative Republican ambassadorial appointee became best known for his efforts to keep the Argentina military junta that took power in March 1976 from engaging in massive human rights violations like those of Captain General Augusto Pinochet in neighboring Chile following his September 1973 coup. Upon finding out that U.S. Secretary of State Henry Kissinger had given the Argentine generals a "green light" for their own so-called "dirty war" in June 1976 while at an Organization of American States meeting in Santiago (at the Hotel Carrera, a place later made famous in the film Missing), Hill immediately engaged in behind-the-scenes efforts to roll back the Kissinger decision. Hill did this although Kissinger aides told him that, if he continued, the Secretary of State would likely have him fired, and even as left-wing Argentine guerrillas attempted to assassinate both the U.S. envoy and members of his family living in Buenos Aires. Hill's role as ambassador to Argentina again became prominent in 2016, when President Barack Obama traveled to that country to mark the 40th anniversary of the dirty "war" generals' supposedly bloodless coup.

He served as U.S. ambassador to several Latin American countries—El Salvador, Costa Rica and Mexico—and to Spain throughout his career. In 1961–1962, he was elected to the New Hampshire General Court. His last posting was in Argentina in the late 1970s, a period of great unrest in that country. He was also Assistant Secretary of State for Congressional Relations under President Eisenhower and Assistant Secretary of Defense for International Security Affairs under President Nixon.

On 1 December 1945, Hill married Cecelia Gordon Bowdoin, who later became known as an accomplished mid-Atlantic tennis champion, duplicate bridge player, and an excellent horse woman. She died on Palm Sunday, 1 April 2012.

He was born in Littleton, New Hampshire. He attended Dartmouth College in the class of 1942. In 1947, he was a member of staff on the Senate Banking Committee.

Robert Charles Hill (30 September 1917 – 28 November 1978) was an American diplomat.