Orsa Municipality (Orsa kommun) is a municipality in Dalarna County in central Sweden. Its seat is located in the town of Orsa.
Orsa is one of a few municipalities in Sweden which has not been amalgamated, but retains its area from the time it was instituted as a municipal entity in 1863.
The town of Orsa is located on the north-eastern shore of the 53 km² large Lake Orsa (Orsasjön). Through a southern water passage it is connected with one of Sweden's largest lakes: Siljan.
By the shores of Orsasjön the Orsa Camping was inaugurated in 1932. With a kilometer long sandy beach, it has received several awards for its quality and beauty, and is by some referred to as the Dalarna Riviera.
Nature sights include the Grönklitt mountain, that houses a notable bear park and skiing hill. The bear park is an enclosed area where not only bears but also wolves, lynx, siberian tigers and wolverines reside, and is the biggest bear park in northern Europe.
Orsa is a locality and the seat of Orsa Municipality, Dalarna County, Sweden, with 5,308 inhabitants (2010). It is located in the northern part of lake Siljan, about 15 kilometres (9 miles) north of the town Mora. Inlandsbanan and European route E45 run through the town and the railroad Bollnäs-Orsa connects.
The southern parts of Orsa are characterized by the Siljan Ring, the ring of lakes and rivers in northern Dalarna formed by the big meteorite strike 365 million years ago. In central Orsa, at the ouflow of river Oreälven a sand bank has been built up, in these days enjoyed by thousands of visitors and the inhabitants of Orsa. The big forests start just north of the town of Orsa, with the sparsely populated Orsa finnmark, to which many Finns emigrated during the 17th century.
Orsa is a genus of moths of the Noctuidae family.
Orsa or ORSA may refer to: