Västmanland (help·info) is a historical Swedish province, or landskap, in middle Sweden. It borders Södermanland, Närke, Värmland, Dalarna and Uppland.

The name comes from "West men", referring to the people west of Uppland, the core province of early Sweden.

The traditional provinces of Sweden serve no administrative or political purposes, but are historical and cultural entities. In the case of Västmanland the corresponding administrative county, Västmanland County, constitutes the eastern part of the province. The western part is in Örebro County.

The coat of arms was granted in 1560. At the time it featured one fire mountain, to represent the mine of Sala Municipality. Soon, their numbers were increased to three, to also symbolize the Lindesberg and Norberg/Skinnskatteberg mines and the present blazon was ratified in 1943.Blazon: "Argent, in base tripple Mount Azure issuant from each Flames Gules." When crowned with a dukal coronet it represents the province. However rather different in size Västmanland County was granted the same CoA in 1943.

Västmanland County (Västmanlands län) is a county or län in central Sweden. It borders to the counties of Södermanland, Örebro, Gävleborg, Dalarna and Uppsala. The county also has a stretch of shoreline towards Mälaren (Sweden's third largest lake).

For History, Geography and Culture see: Västmanland (Westmannia)

The main aim of the County Administrative Board is to fulfil the goals set in national politics by the Parliament and the Government, to coordinate the interests of the county, to promote the development of the county, to establish regional goals and safeguard the due process of law in the handling of each case. The County Administrative Board is a Government Agency headed by a Governor. See List of Västmanland Governors.

The County Council of Västmanland or Landstinget Västmanland.

Lake at the lower right is Mälaren; at the lower left is Hjälmaren.

The County of Västmanland inherited its coat of arms from the province of Västmanland. When it is shown with a royal crown it represents the County Administrative Board.