The Rural Municipality of Cupar No. 218 (2016 population: ) is a rural municipality (RM) in the Canadian province of Saskatchewan within Census Division No. 6 and Division No. 2.
The RM of Cupar No. 218 incorporated as a rural municipality on December 13, 1909.
There are two historical sites located within the RM.
The following urban municipalities lie within the RM.
In the 2021 Census of Population conducted by Statistics Canada, the RM of Cupar No. 218 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 Cupar No. 218 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 Cupar No. 218 is governed by an elected municipal council and an appointed administrator that meets on the second Friday of every month. The reeve of the RM is Raymond Orb while its administrator is Nicole Czemeres. The RM's office is located in Cupar.