Gravvik is a former municipality in the old Nord-Trøndelag county, Norway. The 192-square-kilometre (74 sq mi) municipality existed from 1909 until its dissolution in 1964. The municipality covered the northern coastal areas of the present-day municipality of Nærøysund in Trøndelag county. The administrative centre of the municipality was the village of Gravvik where the Gravvik Church is located.