The 247-square-kilometre (95 sq mi) municipality existed from 1838 until its dissolution in 1964 (although it was originally much larger in 1838).

[7][8] The parish of Vemundvik was established as a municipality on 1 January 1838 (see formannskapsdistrikt law).

In 1846, the village of Namsos was declared to be a ladested, which mean that it was removed from Vemundvik Municipality.

The first element is an old male name Vémundr or the more modern version, Vemund.

At the time of the municipal dissolution, it was part of the Namsos prestegjeld and the Indre Namdal prosti (deanery) in the Diocese of Nidaros.

The municipal council (Herredsstyre) of Vemundvik was made up of 13 representatives that were elected to four year terms.