Grigorios Spandidakis (Greek: Γρηγόριος Σπαντιδάκης, 1909–1996) was a Greek Army officer who rose to the rank of Lieutenant General and the post of Chief of the Hellenic Army General Staff in 1965–1967. From this position, he was instrumental in the military preparations that resulted in the coup d'état of 21 April 1967 and the establishment of the Regime of the Colonels.