Within Greece, the Greek Orthodox Church is organized into 81 dioceses. While the majority is part of the Church of Greece constituting the autocephalous church of Greece, the dioceses of Crete and the Dodecanese, and Mount Athos are under the direct jurisdiction of the Patriarchate of Constantinople. Yet another 30 dioceses in northern Greece and the major islands in the north and northeast Aegean are nominally under the jurisdiction of the Ecumenical Patriarchate of Constantinople, while being administered "in stewardship" as part of the Church of Greece.
Apart from these, various Greek Old Calendarist jurisdictions exist that are not in communion with the Eastern Orthodox Churches under the jurisdiction of the Ecumenical Patriarchate of Constantinople.
^The ROC severed full communion with the Ecumenical Patriarchate in 2018, and later severed full communion with the primates of the Church of Greece, the Patriarchate of Alexandria, and the Church of Cyprus in 2020.
^ abcdefghAutocephaly or autonomy is not universally recognized.
^UOC-MP was moved to formally cut ties with the ROC as of May 27th 2022.
^ abSemi-autonomous part of the Russian Orthodox Church whose autonomy is not universally recognized.