Robert Onan Homme (born c. 1941) is an American former diplomat. A native of Duluth, Minnesota, he joined the United States Foreign Service in 1962 and served in Mexico, Colombia, Italy and Panama. From 1975 to 1981, he was at the State Department in Washington in charge of the Common Market desk, then was director of personnel for Europe. He formerly served as the American Consul General in Strasbourg, France, since August 1981 and ambassador to Costa Rica from March to July 1993. He was married and has three children.