Hemne is a former municipality in Trøndelag county, Norway. The municipality existed from 1838 until its dissolution in 2020 when it was incorporated into Heim Municipality. It was part of the Fosen region. The administrative centre of the municipality was the village of Kyrksæterøra. Other villages included Heim, Hellandsjøen, Holla, and Vinjeøra. The European route E39 highway runs through the southern part of Hemne. At the time of its dissolution in 2020, the municipality is the 169th largest by area out of the 422 municipalities in Norway. Hemne is the 225th most populous municipality in Norway with a population of 4,225. The municipality's population density is and its population has decreased by 0.2% over the last decade. Hemne was established as a municipality on 1 January 1838 (see formannskapsdistrikt law). On 1 January 1911, the northern district of Heim (population: 1,533) was separated from Hemne to form a municipality of its own. This left Hemne with 3,425 residents. On 1 July 1924, Hemne was further divided with the eastern district of Snillfjord (population: 776) and the southern district of Vinje (population: 716) were separated from Hemne to form separate municipalities. After the division, Hemne had 2,030 residents remaining. During the 1960s, there were many municipal mergers across Norway due to the work of the Schei Committee. On 1 January 1964, the neighboring municipalities of Vinje (population: 576) and the parts of Heim west of the Hemnfjorden (population: 711), were merged into Hemne. On 1 January 2008, the Fossdalen farm (population: 4) was transferred from the neighboring municipality of Rindal (in Møre og Romsdal county) to Hemne (in Sør-Trøndelag county). On 1 January 2018, the municipality of Hemne switched from the old Sør-Trøndelag county to the new Trøndelag county. On 1 January 2020, the municipality of Hemne merged with the Ytre Snillfjord area in the neighboring municipality of Snillfjord and the neighboring municipality of Halsa to form the new municipality of Heim (resurrecting an old name for the area).