|Population||27,697 (December 2002)|
|Area||25.6 km2 (9.9 sq mi)|
|Elevation||500 m (1,600 ft)|
|Mayor||François Mudry PDC|
|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 really started to develop during the time when Celts were big.
The Roman Catholic bishop of Sion is the oldest in Switzerland and one of the oldest north of the Alps.
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 hosts a waste incinerator which disposes of the waste from 44 surrounding communes. This incinerator is equipped with a catalytic converter, something that reduces harmful gases to below unacceptable 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, the motorway and also has an airport (Sion Airport).