Grandsherred (later spelled
Gransherad) was established as a municipality in 1860 after the parish of
Hovin (population: 815) in southeastern
Tinn Municipality and the parish of Grandsherred (population: 1,310) in western
Hjartdal Municipality were merged to form the new municipality. On 1 January 1886, the growing municipality was divided based on its "old" borders, with the old parish of
Hovin (population: 885) becoming its own municipality. This left the remainder of Gransherad with a population of 1,393 residents in the now-smaller municipality. During the 1960s, there were many municipal mergers across Norway due to the work of the
Schei Committee. On 1 January 1964, the upper
Jondalen valley area (population: 132) of eastern Gransherad was transferred to the neighboring
Kongsberg Municipality (in
Buskerud county). Also on the same date, Gransherad municipality was dissolved and the following areas were merged to form a new, larger
Notodden Municipality: Historically, the name of the municipality was spelled
Gransherred. In 1867, the spelling was changed to
Grandsherred. This was short-lived, however, because in 1888, the spelling was changed back to
Gransherred. On 3 November 1917, a
royal resolution changed the spelling of the name of the municipality to
Gransherad, using the
Nynorsk spelling instead of the
Bokmål spelling. ==Government==