Dimitrios Oikonomou (Greek: Δημήτριος Οικονόμου; 4 June 1883 – 11 September 1957) was a Hellenic Navy admiral. After fighting as a junior officer in the Balkan Wars, he was a convinced royalist and was dismissed from service in 1917–20. Reinstated, he held various ship and senior commands during the interwar period, including serving as Chief of the Hellenic Navy General Staff in 1935–36. In the latter post he was among the leaders of the military coup of 10 October 1935 that overthrew the Second Hellenic Republic and restored the Greek monarchy.