Primates of the Western Diocese

  • 1928-1934 Bishop Karekin Khachadourian (later Archbishop and Armenian Patriarch of Constantinople)
  • 1942-1946 Bishop Mampré Calfayan (later Archbishop)
  • 1953-1956 Bishop Shnork Kaloustian (later Archbishop and Armenian Patriarch of Constantinople)
  • 1957-1962 Bishop Papken Varjabedian (later Archbishop)
  • 1962-1966 Bishop Torkom Manoogian (later Archbishop, presently Armenian Patriarch of Jerusalem)
  • 1966-1970 Bishop Yeghishé (Elisha) Simonian
  • 1971-2003 Archbishop Vatché Hovsepian
  • 2003- present Archbishop Hovnan Derderian

Locum Tenens of the Western Diocese

  • 1934-1935 Very Rev. Fr. Kegham Kasimian
  • 1936 Very Rev. Fr. Yeghiazar Ashjian
  • 1937-1938 Bishop Hovsep Garabedian
  • 1939-1941 Bishop Mampré Calfayan (later Archbishop)
  • 1946-1953 Bishop Vartan Kasparian (later Archbishop)
  • 1970-1971 Very Rev. Fr. Dirayr Dervishian (later Dzayrakooyn Vartabed)