Leland Burnette Morris (February 7, 1886 – July 2, 1950) was an American diplomat. A native of Fort Clark, Texas, he was the first United States Ambassador to Iran, serving that post from 1944 to 1945. Earlier he was United States Ambassador to Iceland from 1942. Morris served many other diplomatic posts including American Consul General in Jerusalem in 1936, American Consul General in Vienna from 1938 to 1940 after the German annexation of Austria and the American "chargé d'affaires" in Germany during the outbreak of official American involvement in World War II.