Robert Vossler Keeley (September 4, 1929 – January 9, 2015) was an American politician. He served in Foreign Service of the United States, from 1956 to 1989. He served three times as Ambassador: to Greece (1985–89), Zimbabwe (1980–84), and Mauritius (1976–78). In 1978–80 he was Deputy Assistant Secretary of State for African Affairs, in charge of southern and eastern Africa.