Konstantinos Mavromichalis (; Mani, 1797–Nafplio, 1831), brother of the Bey of Mani, Petros Mavromichalis, was a Greek military commander of Maniot forces during the Greek War of Independence, and the assassin of the first head of state of Greece, Ioannis Kapodistrias. Along with Demetrios Ypsilantis, he commanded the forces that saved Nafplio from Ibrahim Pasha of Egypt, during the Ottoman–Egyptian invasion of Mani. He participated and excelled in the battles of Valtetsi, Lerna Mills, Vergas, Diro, Polyaravos, and others. He served as a member of the Executive of 1824 in the First Hellenic Republic, from 9 November 1824 until 17 April 1826.