Roman Catholic Diocese of Sion

Diocese of Sion Dioecesis Sedunensis Bistum Sitten (German) Diocèse de Sion (French)
Location
Metropolitan	Immediately Subject to the Holy See
Statistics
Area	5,589 km2 (2,158 sq mi)
Population - Total - Catholics	(as of 2020) 358,213 260,971 (72.9%)
Parishes	157
Information
Denomination	Catholic
Sui iuris church	Latin Church
Rite	Roman Rite
Established	4th century
Cathedral	Cathédrale Notre-Dame du Glarier
Current leadership
Pope	Francis
Bishop	Jean-Marie Lovey
Bishops emeritus	Norbert Brunner
Map
Map of the modern diocese of Sion within Switzerland
Website
Website of the Diocese

The Diocese of Sion (Latin: Dioecesis Sedunensis, French: Diocèse de Sion, German: Bistum Sitten) is a Latin Catholic ecclesiastical territory in the canton of Valais, Switzerland. It is the oldest bishopric in the country and one of the oldest north of the Alps. The history of the Bishops of Sion, of the Abbey of St. Maurice of Valais as a whole are inextricably intertwined.