The civil administrator of Mount Athos is the civil head of government of the territory of the monastic community of Mount Athos, an autonomous region in northern Greece. His seat is Karyes, Mount Athos. There are several other offices established in Thessaloniki and Ouranoupoli. Since 3 September 2019, the incumbent civil administrator is businessman and Archon Offikialios of the Ecumenical Patriarchate of Constantinople, Athanasios Martinos.