The RM was incorporated on January 1, 2015 via the amalgamation of the RM of Ste. Rose and the Town of Sainte Rose du Lac.[1] It was formed as a requirement of The Municipal Amalgamations Act, which required that municipalities with a population less than 1,000 amalgamate with one or more neighbouring municipalities by 2015.[3] The Government of Manitoba initiated these amalgamations in order for municipalities to meet the 1997 minimum population requirement of 1,000 to incorporate a municipality.[4]
In the 2021 Census of Population conducted by Statistics Canada, Ste. Rose had a population of 1,591 living in 700 of its 764 total private dwellings, a change of -7.1% from its 2016 population of 1,712. With a land area of 630.04 km2 (243.26 sq mi), it had a population density of 2.5/km2 (6.5/sq mi) in 2021.[5]