The 865-square-kilometre (334 sq mi) municipality existed from 1838 until 1892 in what was at that time the United Kingdoms of Sweden and Norway.

On 15 January 1892, the King approved a royal resolution to split up Bjørør Municipality.

The law went into effect on 1 June 1892 when Bjørnør Municipality ceased to exist.

The first element plural genitive case of the word bjǫrn which means "bear".

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