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".