The Rural Municipality of Keys No. 303 (2016 population: ) is a rural municipality (RM) in the Canadian province of Saskatchewan within Census Division No. 9 and Division No. 4.
The RM of Keys No. 303 incorporated as a rural municipality on January 1, 1913.
The following unincorporated communities are within the RM.
In the 2021 Census of Population conducted by Statistics Canada, the RM of Keys No. 303 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 Keys No. 303 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's office is located in the Town of Canora.
The RM of Keys No. 303 is governed by an elected municipal council and an appointed administrator that meets on the first Thursday of every month. The reeve of the RM is Garth Bates while its administrator is Barry Hvidston. The RM's office is located in Canora.