Karlsborg is a Municipality in Västra Götaland County, in western Sweden. The municipality covers an area of 433.0 km2. Of the total population of 7100, 3559 are male, and 3541 are female. The population density of the community is 16 inhabitants per km2. The town of Karlsborg was established and grew due to the construction of Karlsborg Fortress, during the 19th century. According to the principles of a central defense, the fortress was designated as the reserve capital of Sweden in the event of war. Tiveden National Park is partly situated within the municipality.