Efthymios (Thimio) E. Mitropoulos (Greek: Ευθύμιος Μητρόπουλος; born 30 May 1939 in Piraeus, Greece) was the seventh Secretary-General of the International Maritime Organization (IMO), a United Nations agency. Mitropoulos was elected as Secretary-General on 18 June 2003 during the 19th session of the International Maritime Organization Council. His four-year term started on 1 January 2004, and then was extended until 31 December 2011 by the IMO Council on 9 November 2006.