Hemne is a municipality in Sør-Trøndelag county, Norway. It is part of the Fosen region. The administrative centre of the municipality is the village of Kyrksæterøra. Other villages include Heim, Hellandsjøen, Holla, and Vinjeøra. The highway E39 runs through the southern part of Hemne.
Hemne was established as a municipality on 1 January 1838 (see formannskapsdistrikt). On 1 January 1911, the district of Heim was separated from Hemne to form a municipality of its own. This left Hemne with 3,425 residents. On 1 July 1924, Snillfjord and Vinje were separated from Hemne to form separate municipalities. After the division, Hemne had 2,030 residents remaining. Then on 1 January 1964, Vinje (population: 576) and the parts of Heim west of the Hemnfjorden (population: 711), were merged back into Hemne. On 1 January 2008, the Fossdalen farm (population: 4) was transferred from Rindal (in Møre og Romsdal county) to Hemne (in Sør-Trøndelag county).