Prehistoric settlement
Sion is one of the most important prehistoric sites in Europe. The alluvial fan of the river Sionne, the rocky slopes above the river and, to a lesser extent, Valeria and Tourbillon hills … See more

The blazon of the municipal coat of arms is Per fess Argent two Mullets of Five Gules and Gules. See more

The municipal council is the executive power in the commune. Its 15 members, non-permanent except the President, are elected every 4 … See more

There are 14 buildings or sites in Sion that are listed as Swiss heritage site of national significance. The secular buildings include the Archives de l’État du Valais, the Archives and Museum of the Bishop of Sion and the cathedral, the town hall (with its See more

After the 2017 merger Sion had an area of 34.86 km (13.46 sq mi).
Before the merger Sion had an area (as of the September 2004 survey) of 29.69 square kilometers (11.46 sq mi). Of this area, about 38.9% is used for agricultural purposes, while … See more

Sion has a population (as of December 2020 ) of 34,978. As of 2008 , 26.9% of the population are resident foreign nationals. Over years 2000–2010 the population changed at a rate of 10%. It has changed at a rate of 10.1% due to migration and at a … See more

The tertiary sector is the main economic sector in Sion, mainly due to the presence of the cantons administration, the Valaisan parliament and the cantons courthouse. Tourism is also an … See more