Norberg is a locality and the seat of Norberg Municipality in Västmanland County, Sweden with 4,518 inhabitants in 2010. Best known for the Norbergfestival which is Scandinavias biggest electronic music festival, organized in an old iron ore mine. Norberg consists of two large parts, the actual Norberg in the south and Kärrgruvan in the north, along with s…Norberg is a locality and the seat of Norberg Municipality in Västmanland County, Sweden with 4,518 inhabitants in 2010. Best known for the Norbergfestival which is Scandinavias biggest electronic music festival, organized in an old iron ore mine. Norberg consists of two large parts, the actual Norberg in the south and Kärrgruvan in the north, along with smaller settlements scattered around the area.