Roman Catholic Archdiocese of Sens

The Archdiocese of Sens and Auxerre (Latin: Archidioecesis Senonensis et Antissiodorensis; French: Archidiocèse de Sens et Auxerre) is a Latin archdiocese of the Catholic Church in France. The archdiocese comprises the department of Yonne, which is in the region of Burgundy.

Established in sub-apostolic times, according to late local legends, the diocese, as metropolis of the province of Quarta Lugdunensis, achieved ecclesiastical metropolitical status in the 7th century. For a time, the archbishop of Sens held the title "primate of the Gauls and Germania". The title was transferred to Lyon in the latter part of the 11th century.

After the creation of the archdiocese of Paris in 1622, the metropolitan archdiocese of Sens had three suffragan (subordinate) dioceses: Auxerre, Nevers and Troyes. The Diocese of Bethléem at Clamecy was also dependent on the metropolitan see of Sens. On December 8, 2002, as part of a general reorganization of the dioceses of France undertaken, at least in part, to respond to demographic changes, the Archdiocese of Sens-Auxerre ceased to have metropolitan rank and became a suffragan of the Archdiocese of Dijon, which became the centre of a new ecclesiastical province for the Burgundy administrative region.