The Diocese of Jaca is a Latin ecclesiastical territory or diocese of the Catholic Church in the northeastern Spanish province of Huesca, part of the autonomous community of Aragón. The diocese is a suffragan in the ecclesiastical province of the metropolitan Archdiocese of Pamplona y Tudela.

The Archdiocese of Pamplona and Tudela is a Latin Church archdiocese of the Catholic Church located in the cities of Pamplona and Tudela in Spain.