The Diocese of Bayonne, Lescar, and Oloron, commonly Diocese of Bayonne, is a Latin Church ecclesiastical territory or diocese of the Catholic Church in France. It is a suffragan diocese in the ecclesiastical province of the metropolitan Archdiocese of Bordeaux. The diocese comprises the département of Pyrénées-Atlantiques, in the région of Nouvelle-Aquitaine.

The Archdiocese of Bordeaux (–Bazas) is a Latin Church ecclesiastical territory or archdiocese of the Catholic Church in France. The episcopal see is Bordeaux, Aquitaine. It was established under the Concordat of 1802 by combining the ancient Diocese of Bordeaux with the greater part of the suppressed Diocese of Bazas. The Archdiocese of Bordeaux is a metropolitan see, with four suffragan dioceses in its ecclesiastical province: Dioceses of Agen, Aire and Dax, Bayonne, and Périgueux.