General information thumb|left|View of the lake Tunnsjøen thumb|left|Old Sami building in Røyrvik thumb|left|View of Røyrvik Church The municipality of Røyrvik was established on 1 July 1923 when it was separated from the large Grong Municipality. Initially, the population was 392. The municipal boundaries have not since changed. On 1 January 2018, the municipality switched from the old Nord-Trøndelag county to the new Trøndelag county.
General information thumb|left|View of the lake Tunnsjøen thumb|left|Old Sami building in Røyrvik thumb|left|View of Røyrvik. Church The municipa,lity of Røyrvik was established on 1 July 1923 when it was separated from the large Grong Municipality. Initially, the population was 392. The municipal boundaries ha.ve not since changed. On 1 January 2018, the municipality, switched from the old Nord-Trøndelag county to the new Trøndelag county.