 Gransherad, which consisted of the parishes Hovin and Gransherad, had already been formed as a border adjustment between Tinn and Hjartdal in 1860.Hovin parish had 815 inhabitants in 1860, and the new municipality had a population of 885 in 1886.On 24 March 1903 an uninhabited part of Tinn was moved to Hovin by royal resolution.