Røyrvik (Southern Sami: Raarvihke) is a village and municipality in Nord-Trøndelag county, Norway. It is part of the Namdalen region. The administrative centre of the municipality is the village of Røyrvik. The area has always had a strong Sami influence.

The 0.39-square-kilometre (96-acre) village of Røyrvik sits in the central part of the municipality and serves as the administrative center of the municipality. The village of Røyrvik has a population (2013) of 231, which gives it a population density of 592 inhabitants per square kilometre (1,530/sq mi).

The municipality of Røyrvik was established on 1 July 1923 when it was separated from the municipality of Grong. Initially, the population was 392. The municipal boundaries have not since changed.

The municipality (originally the parish) is named after the old Røyrvik farm (historically: Røirviken), since the first church, Røyrvik Church, was built there (in 1828). The first element is røyr which means Arctic char and the last element is vik which means "inlet".

The coat-of-arms is from modern times; they were granted on 13 December 1985. The arms show a silver cross design on a blue background. This design is a common decoration on the pottery, hand-made articles, and traditional pewter embroidery found in the area. These objects were made by the ancestors of the Southern Sámi people presently living in the area. The crosses probably indicate the four points of the compass.

The Church of Norway has one parish (sokn) within the municipality of Røyrvik. It is part of the Namdal deanery in the Diocese of Nidaros.

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