The Diocese of Rottenburg-Stuttgart is a Latin Church ecclesiastical territory or diocese of the Catholic Church in Germany. It is a suffragan in the ecclesiastical province of the metropolitan Archdiocese of Freiburg in Baden-Württemberg, Bundesland. It covers the same territory of the former Kingdom of Wurttemberg.

The Archdiocese of Freiburg im Breisgau is a Latin Church diocese of the Catholic Church in Baden-Württemberg comprising the former states of Baden and Hohenzollern. The Archdiocese of Freiburg is led by an archbishop, who also serves as the metropolitan bishop of the Upper-Rhine ecclesiastical province for the suffragan dioceses of Mainz and Rottenburg-Stuttgart. Its seat is Freiburg Minster in Freiburg im Breisgau.