The Rural Municipality of Surprise Valley No. 9 (2016 population: ) is a rural municipality (RM) in the Canadian province of Saskatchewan within Census Division No. 2 and Division No. 2. Located in the southeast portion of the province, it is adjacent to the United States border, neighbouring Sheridan County in Montana.
The RM of Surprise Valley No. 9 incorporated as a rural municipality on January 1, 1913.
The following urban municipalities are surrounded by the RM.
The following unincorporated communities are within the RM.
In the 2021 Census of Population conducted by Statistics Canada, the RM of Surprise Valley No. 9 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 Surprise Valley No. 9 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 Surprise Valley No. 9 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 Herb Axten while its administrator is Loran Tessier. The RM's office is located in Minton.