Diocese/Archidocese/Province/Patriarchate of Babylon (the office and area) or Bishop/Archbishop/Patriarch of Babylon (the person) may refer to:
- Babylon, Mesopotamia
- Abdias of Babylon, first bishop of Babylon, one of the Seventy Apostles
- Polychronius, bishop of Babylon; July 30 (Eastern Orthodox liturgics) commemorates his martyrdom in AD 251
- Patriarch of the Church of the East or Patriarch of Babylon
- List of patriarchs of the Church of the East
- Patriarchal Province of Seleucia-Ctesiphon, or the diocese of Seleucia-Ctesiphon within the province
- Chaldean Catholic Patriarchate of Babylon, established after the 1552 schism, based in Baghdad
- Latin Catholic Diocese of Babylon, 1632–1848; subsequently the Archdiocese of Baghdad
- Babylon, Egypt
- Diocese of Babylon, at Babylon Fortress in Coptic Cairo, Egypt; an Early Christian suffragan of Leontopolis, now a titular see
- Bishop Babylonos, title since 2009 of the hegumen of the Monastery of St George under the Greek Orthodox Patriarchate of Alexandria