Holy Cross Orthodox Monastery (also known as Holy Cross Monastery) is a monastic institution of the Orthodox Church in America (OCA), located in Castro Valley, California. The clergy of the monastery previously served under the omophorion of Archbishop Kyrill, who led the OCA's Orthodox Church in America Archdiocese of Pittsburgh and Western Pennsylvania and the Diocese of Toledo, Ohio. Since the repose of Archbishop Kyrill during the summer of 2007, they now serve under the omophorion of Metropolitan Tikhon (Mollard).