Stamatis Mercouris (Greek: Σταμάτης Μερκούρης, 1895 - 1967) was a Greek Army officer and politician, who served as an MP and a Cabinet Minister. A member of the prominent Mercouris family, he was the son of Spyridon Mercouris, long-serving Mayor of Athens in the early 20th century, and the younger brother of George Mercouris, far-right politician and Cabinet Minister. In contrast to his conservative father and brother, Stamatis would end up becoming a Member of Parliament for the Left; his daughter was the famous actress Melina Mercouri, Minister of Culture in the socialist government of Andreas Papandreou.
Stamatis Mercouris was born in Athens in 1895, son of Spyridon Mercouris and younger brother of George Mercouris. He graduated from the Hellenic Military Academy as a second lieutenant of Cavalry, and fought in World War I in 1917-18 and the Greco-Turkish War in 1919-22.
He then left the Army and entered politics, taking part in the creation of the People's Party, Greece's main center-right political force at the time. Mercouris later left the People's Party and joined the National Radical Party, founded by the former General Georgios Kondylis. From 1929 until 1932, Stamatis Mercouris served as General Director of the Athens city government, under his father Spyridon Mercouris, who was then serving his last term as Mayor of Athens.
In 1935 he served as Undersecretary to the Prime Minister's Office, during Kondylis's brief premiership. During World War II, and after the Nazis had occupied Greece, he founded a resistance organization, the Rizospastiki Organosis (literally "Radical Organization") which, though small in size, helped many Greek officers and soldiers escape to the Middle East, where they joined the Allied war effort.