Brandon Souris is located in the southwestern corner of Manitoba. Consisting of that part of the Province of Manitoba described as follows: commencing at the intersection of the west boundary of the Province of Manitoba with the north boundary of Tp 12; thence east along the north boundary of Tp 12 to the east boundary of R 13 W 1, being the easterly boundary of the Rural Municipality of North Cypress; thence generally southerly along the easterly limits of the rural municipalities of North Cypress, South Cypress, Argyle and Roblin to the south boundary of the Province of Manitoba; thence west and north along the south and west boundaries of said province to the point of commencement.