Konstantinos Ventiris (Greek: Κωνσταντίνος Βεντήρης, 1892–1960) was a Hellenic Army officer who rose to the rank of lieutenant general. He served twice as Chief of the Hellenic Army General Staff and was one of the senior government commanders during the Greek Civil War. He is also one of the few recipients the country's highest wartime decoration, the Commander's Cross of the Cross of Valour.