Agamemnon Gratzios or Gratsios (Greek: Αγαμέμνων Γκράτσιος/Γκράτζιος, 28 February 1922 – 11 August 1993) was a Hellenic Army officer who rose to the rank of full General, and held the posts of Chief of the Hellenic Army General Staff and of the Hellenic National Defence General Staff.

He entered the Hellenic Military Academy, but the outbreak of the Greco-Italian War on 28 October 1940 interrupted his studies; along with his classmates, he participated in the Battle of Crete, where he was seriously wounded.

During the Greek Civil War, he served as a platoon, company and battery commander, being promoted to lieutenant (1946) and captain (1948).

He also commanded the 12th Infantry Division, the ASDEN and III Army Corps, and First Army, being successively promoted to major (1952), lieutenant colonel (1958), colonel (1967), brigadier (1971), major general (1972) and lieutenant general (1974).

[1] On 14 September 1976 he assumed the position of Chief of the Army Command, which a year later was reconstituted again as the Hellenic Army General Staff, a post he held until 11 January 1980, when he was appointed as Chief of the Hellenic National Defence General Staff and promoted to full general.