Roman Catholic Diocese of San Carlos de Bariloche Tags: Clerical Administrative Region, Diocese.The Roman Catholic Diocese of San Carlos de Bariloche is located in the city of San Carlos de Bariloche usually referred to as Bariloche in the province of Río Negro Argentina. The city is located in the foothills of the Andes. thumbnail area (km2) 7.6986e+10 country Argentina Established 22 July 1993 ( years ago) province Roman Catholic Archdiocese of Bahía Blanca Learn more... Loading...