The parish of Børsa was established as a civil municipality on 1 January 1838 (see formannskapsdistrikt). On 1 January 1890, the municipality was divided into two: Børseskognen (population: 1,410) in the south and Børsa (population: 2,300) in the north. On 1 January 1905, the area of northwest of the Orkdalsfjorden (population: 674) was separated to become the new municipality of Geitastrand and the area southeast of the fjord remained as Børsa with a population of 1,420. This shrunk the municipality of Børsa from 180 square kilometres (69 sq mi) to only 61 square kilometres (24 sq mi).[3][5]
During the 1960s, there were many municipal mergers across Norway due to the work of the Schei Committee. On 1 January 1965, the neighboring municipalities of Børsa (population: 1,476), Skaun (population: 1,251), and Buvik (population: 1,267) were merged to form the new, larger municipality of Skaun.[5]
Name
The municipality (originally the parish) is named after local bay (Old Norse: Birgsi) that lies along the village of Børsa. The first element is a derivative of the word bjarg which means "cliff" or "rock". The last element is the suffix -si which has an uncertain meaning.[6] Historically, the name of the municipality was spelled Børsen. On 3 November 1917, a royal resolution changed the spelling of the name of the municipality to Børsa.[7]
The municipal council(Herredsstyre) of Børsa was made up of representatives that were elected to four year terms. The party breakdown of the final municipal council was as follows:
^ abHelland, Amund (1898). "Børsen herred". XVI Søndre Trondheims amt. Anden del. Norges land og folk (in Norwegian). Kristiania, Norway: H. Aschehoug & Company. p. 354. Retrieved 3 July 2022.