The Ukrainian Catholic Eparchy of Santa María del Patrocinio en Buenos Aires (Latin: Eparchia Sanctae Mariae a Patrocinio Bonaënsis) is an eparchy (diocese, bishopric) of the Ukrainian Greek Catholic Church, which uses the Byzantine Rite in the Ukrainian language, for its faithful in major immigration country Argentina. Its cathedral see is in the capital city of Buenos Aires, but must not be confused with the Roman Catholic (Latin rite) Metropolitan see of the Ecclesiastical province of Buenos Aires in Argentina.