Älvdalen Municipality (Älvdalens kommun) is a municipality in Dalarna County in central Sweden. Its seat is located in the town of Älvdalen.
The two parishes Särna and Idre were ceded to Sweden from Norway under the treaty of Brömsebro on 13 August 1645. In 1971 the three municipalities Särna, Idre (which itself had been split off from Särna in 1916) and Älvdalen were amalgamated to form the present municipality.
Älvdalen literally means River Valley, a name stemming from the area around the town Älvdalen, situated along the Österdal River, in the municipality's southern part.
The middle part of the coat of arms is meant to depict the landscape: streams and hills.
Idre, with about 800 inhabitants is a notable skiing resort.
This part has some high mountains including Storvätteshågna at 1,204 meters and Städjan at 1,131 m. The Töfsingdalen National Park is also located in the northernmost parts.
The town Särna is located along the Österdal River, with 930 inhabitants. Like Idre, its main industry is tourism. The town once belonged to Norway, but in 1644 it was occupied by 200 Swedish peasants, which in effect made it a Swedish town, although it was official granted first with new borders of 1751.
This area may be said to have the most interesting culture, with the town Älvdalen and several notable villages such as Evertsberg, Blyberg, Klitten, Brunnsberg, Västermyckeläng and Åsen.