Roan is a municipality in Sør-Trøndelag county, Norway. It is part of the Fosen region in the northern part of the county. The administrative centre of the municipality is the village of Roan. Other villages include Bessaker, Brandsfjord, and Hofstad.

A large wind park is located on the mountain plateau just southeast of Bessaker.

The municipality of Roan was established on 1 June 1892 when the old municipality of Bjørnør was divided into three separate municipalities: Roan, Osen, and Stoksund. The initial population of Roan was 2,069. The borders of the municipality have remained the same since then.

The municipality (originally the parish) is named after the old Roan farm where the first church was built. The name is probably derived from the Old Norse word róða which means "pole" a reference to a mountain peak behind the farm.

The coat-of-arms is modern and was granted on 22 May 1987. The arms show three silver terns on a blue background. Terns, a very watchful and energetic bird, are intended to symbolize the local inhabitants and the coast with the vast bird life in the area.

The Church of Norway has one parish (sokn) within the municipality of Roan. It is part of the Deanery (prosti) of Fosen and the Diocese of Nidaros.

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