|• Mayor||François Mudry CVP/PDC|
|• Total||29.81 km2 (11.51 sq mi)|
|Elevation||500 m (1,600 ft)|
|• Density||1,200/km2 (3,000/sq mi)|
|Time zone||UTC+01:00 (Central European Time)|
|• Summer (DST)||UTC+02:00 (Central European Summer Time)|
|Surrounded by||Ayent, Conthey, Grimisuat, Grône, Les Agettes, Nax, Nendaz, Saint-Léonard, Salins, Savièse, Vernamiège, Vex|
|Twin towns||Colón (Argentina), Philippi (United States)|
The older area of the city still stays and is well preserved. As well as the two Château's, a number of other important buildings are there, such as the Château de la Majorie, the Hôtel de Ville and the Cathédrale Notre-Dame de Sion.
Sion started to develop during the time of the Celts.
On 1 January 2013, the former municipality of Salins merged into the municipality of Sion.
In 2017, Les Agettes became part of the municipality.
The tertiary sector is the main economic sector in Sion. Tourism is also an important sector due to its historic château's and museums.
Finally, the commune has a waste incinerator which disposes of the waste from 44 surrounding communes. This incinerator has a catalytic converter, something that reduces harmful gases to acceptable levels. The heat created from the burning is converted into electrical energy that is then provided to local communes.
Sion is on the main railway line and the motorway. It also has an airport (Sion Airport).
- "Arealstatistik Standard - Gemeinden nach 4 Hauptbereichen". Federal Statistical Office. Retrieved 13 January 2019.
- https://www.pxweb.bfs.admin.ch/pxweb/fr/px-x-0102020000_201/-/px-x-0102020000_201.px; retrieved: 2 June 2020.