Fredriksberg (sometimes referred to as Säfsen or Säfsnäs, because of the nearby tourism facility or the parish and old municipality names) is a locality situated in Ludvika Municipality, Dalarna County, Sweden with 655 inhabitants in 2010. It's the 926th largest urban area in Sweden, and the fourth largest in Ludvika Municipality.
Fredriksberg, located about 60 km west of the municipality seat in Ludvika, is the demographic and commercial centre of the western part of the municipality, and hosts some parts of the municipal administration. Fredriksberg is centrally situated in western Svealand, close to the border between Dalecarlia and Värmland, with most larger towns and cities in the region, such as Borlänge, Karlstad, Örebro, Falun, Karlskoga and Mora on a distance of between 80 and 130 kilometres (50 and 80 mi).
Fredriksberg was founded during the 18th century as an industrial society, and heavy industries, mainly focused on iron ore and forest processing, did for a long period of time play an important role in the town. The surroundings of Fredriksberg is dominated by a beautiful landscape of wilderness, great forests and lakes. Being one of the most popular destination for foreign visitors to Sweden, the tourism today stands for the main economic revenue for the town. The townscape of Fredriksberg still today carries many remains of older industrial epochs, which has made the town to a popular target for urban exploration.