Chaldean Catholic Eparchy of Saint Peter the Apostle (Latin: Eparchia Sancti Petri Apostoli urbis Sancti Didaci Chaldaeorum) is one of two eparchies (Eastern catholic dioceses) of the Chaldean Catholic Church sui iuris (Syro-Oriental Rite, Syriac/Arameic language) in the USA. It is exempt, i.e. immediately subject to the Holy See, not part of any ecclesiastical province. Its cathedral episcopal see is St. Peter's Chaldean Catholic Cathedral, located in El Cajon, California.