[2] The RM was located in the southwestern corner of the province, approximately 47 kilometres southwest of Manitoba's second-largest city, Brandon.
In 1880, the first four permanent residents arrived and established homesteads along Plum Creek, approximately 1.5 kilometres west of what today is Souris.
Most early settlers established homesteads in the Souris area, while others settled in the surrounding town sites.
By the end of 1883, the area was completely settled, and by 1884 the town site of Souris contained over 50 buildings.
The Town of Souris was incorporated in 1904 as a separate municipal government, and its first mayor was A.L.