The Rural Municipality of Montrose No. 315 (2016 population: ) is a rural municipality (RM) in the Canadian province of Saskatchewan within Census Division No. 12 and Division No. 5.
The RM of Montrose No. 315 incorporated as a rural municipality on December 13, 1909.
The following unincorporated communities are within the RM.
In the 2021 Census of Population conducted by Statistics Canada, the RM of Montrose No. 315 had a population of living in of its total private dwellings, a change of from its 2016 population of . With a land area of , it had a population density of in 2021.
In the 2016 Census of Population, the RM of Montrose No. 315 recorded a population of living in of its total private dwellings, a change from its 2011 population of . With a land area of , it had a population density of in 2016.
The RM of Montrose No. 315 is governed by an elected municipal council and an appointed administrator that meets on the second Thursday of every month. The reeve of the RM is Murray Purcell while its administrator is Desiree Bouvier. The RM's office is located in Delisle.