The municipality was formed in 1998 through an amalgamation of the former Township of McMurrich and the eastern two-thirds of the unincorporated Township of Monteith. The remaining portion of Monteith became part of Seguin.
Population in 2011: 779 (2006 to 2011 population change: -1.5 %)
Population in 2006: 791
Population in 2001: 766
Population in 1996: 723 (adjusted for boundary changes)
According to the 2011 Census, McMurrich/Monteith has a population of 779 people over a territory of 278.13 km². The number of private dwellings occupied by usual residents were 333, out of a total of 839 dwellings.
Mother tongue statistics for the 2006 census  are as follows: