Dumitru Dămăceanu (1896 – 1978) was a Romanian army officer in World War II, later promoted to Brigadier-General, who played a predominant role in the Royal coup of August 23, 1944.
Before the war, he was military attaché in Rome, Italy, director at the Voievodul Mihai School, and adjutant to King Carol II.
From 1941 to 1942 he was commanding officer of the 10th Roşiori Cavalry Regiment, fighting on the Eastern Front. From 1942 to 1944 he was Chief of Staff of the Capital Military Command.
Colonel Dămăceanu participated in the August 23, 1944 coup d'etat led by King Michael against the government of Marshal Ion Antonescu. He organized and coordinated the military actions and resistance in Bucharest. By the end of August 1944, he travelled to Moscow with a Romanian delegation; they were received by Soviet Foreign Minister Vyacheslav Molotov on August 30 or 31. On September 12, 1944, General Dămăceanu was one of the plenipotentiary signatories of the Armistice Agreement between Romania and the Soviet Union (the other signatories were Lucrețiu Pătrășcanu, Ghiţă Popp, and Barbu Ştirbey on the Romanian side, and Rodion Malinovsky on the Soviet side).