Julius Cecil Holmes (April 24, 1899 – July 16, 1968) was a US government official who served as Ambassador to Iran. Holmes was born in Pleasanton, Kansas and graduated from the University of Kansas in 1922. In 1953, Holmes was Minister at the American Embassy in London. Two years later, in 1955, Holmes served as Ambassador to Iran, a position he reprised from 1961 to 1965. From 1956 to 1959 Holmes was the Special Assistant to the Secretary of State for NATO Affairs. From 1959 to 1961 Holmes served as Consul General to Hong Kong.