Rattvik Municipality (Rattviks kommun) is a municipality in Dalarna County, central Sweden. The seat is in is Rattvik. In 1963 the municipality was reunited with Boda, which had been detached from it in 1875, and in 1974 Ore was added, thus forming the present municipality. Rattvik municipality is situated in the middle of Sweden in the province of Dalarna, in between the three Swedish cities Borlange, Falun and Mora. It is located in a traditional forest and agriculture environment, which is how most of Sweden looked in the 19th century and earlier. Nowadays, its culture also attracts a significant number of tourists. The area near Rattvik municipality has the highest population of Brown Bears in Sweden. Rattvik is a worldwide-known small town because of its old tradition of folkmusic and the beauty of the surroundings close to Lake Siljan. Many tourists who are visiting Sweden go to Rattvik to experience a traditional Swedish and Scandinavian way of living.

In the little village of Nusnas, the original Dalecarlia Horses or Dalahästar – a handsculpted wooden horse colored orange red and painted with a special pattern – are still being crafted and sold. Its culture and landscape are by some regarded as being as genuinely Swedish as it gets. For instance, Rattvik still has its picturesque old church located by the water, where it is surrounded by old "church stables" where the church visitors used to leave their horses. Every year the folk music festival "Music at Siljan" is held in Rattvik, by the shores of Siljan. The annual summer opera festival, the Dalhalla Opera, takes place 7km north of the town in an open-air theatre located in a former limestone quarry.