Portage la Prairie is a rural municipality (RM) in the province of Manitoba in Western Canada. It surrounds the city of Portage la Prairie, Manitoba's fifth-largest city. Also within the borders of the municipality are the Dakota Plains First Nation and most of the Long Plain First Nation Indian reserves.
In the 2021 Census of Population conducted by Statistics Canada, Portage la Prairie had a population of 6,888 living in 2,167 of its 2,456 total private dwellings, a change of from its 2016 population of 6,975. With a land area of , it had a population density of in 2021.