|• Total||1,137.835976 km2 (439.320926 sq mi)|
|• Land||959.015976 km2 (370.278138 sq mi)|
|• Water||178.82 km2 (69.04 sq mi)|
|Area as of January 1, 2014.|
|Population (December 31, 2017)|
|• Density||130/km2 (340/sq mi)|
|Time zone||CET (UTC+1)|
|• Summer (DST)||CEST (UTC+2)|
|ISO 3166 code||SE|
|Density is calculated using land area only.|
The municipality prefers to use the denomination Västerås stad (City of Västerås) for the whole territory, including rural areas.
The municipality evolved gradually during the municipal reforms in Sweden. Most of the amalgamations took place in 1967 and the municipality in its present form was created in 1971. There are 30 original local government units within the present municipality.
The largest towns with pop. figures from 2005:
Twin towns — Sister citiesEdit
Västerås is twinned with:
- "Statistiska centralbyrån, Kommunarealer den 1 januari 2014" (Microsoft Excel) (in Swedish). Statistics Sweden. Retrieved 2014-04-18.
- "Folkmängd i riket, län och kommuner 31 december 2017" (in Swedish). Statistics Sweden. February 21, 2018. Retrieved February 21, 2018.
- "Gaborone, Västerås city councils twin". Gaborone: Daily News. 27 October 2011. Archived from the original on 23 June 2012. Retrieved 23 June 2012.