Vemundvik is a former municipality in the old Nord-Trøndelag county, Norway. The 247-square-kilometre (95 sq mi) municipality existed from 1838 until its dissolution in 1964 (although it was originally much larger in 1838). By 1964, the municipality roughly corresponded to the mainland areas north of the river Namsen in what is now the municipality of Namsos in Trøndelag county. From 1838 until about 1942, the administrative centre was the village of Vemundvik where Vemundvik Church is located. After 1941, the municipal offices and administration was headquartered in the town of Namsos (which was technically not part of the municipality).