John Apokaukos (Greek: Ἱωάννης Ἀπόκαυκος, ca. 1155 – 1233) was a Byzantine churchman and theologian. Having studied at Constantinople, he became bishop of Naupaktos and played a major role in the rivalry between the Epirote Church and the Ecumenical Patriarchate, exiled in the Empire of Nicaea.