The RM was incorporated on January 1, 2015 via the amalgamation of the RM of Ethelbert and the Town of Ethelbert.[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, Ethelbert had a population of 648 living in 290 of its 366 total private dwellings, a change of 6.8% from its 2016 population of 607. With a land area of 1,134.59 km2 (438.07 sq mi), it had a population density of 0.6/km2 (1.5/sq mi) in 2021.[2]