Konstantinos Engolfopoulos (Greek: Κωνσταντίνος Εγκολφόπουλος, 1912–1991) was a Hellenic Navy officer who served twice as Chief of the Hellenic Navy General Staff (1967 and 1975–76), retiring with the rank of vice admiral. He is notable for his opposition to the Greek military junta of 1967–74, which imprisoned him. He also served briefly as Minister for Mercantile Marine in 1974.