Chester No. 125 (2006 Population 386 ) is a rural municipality in south-eastern Saskatchewan, Canada encompassing 837.08 square kilometers in area. The rural municipality maintains its office in Glenavon, Saskatchewan. The communities of Glenavon, Windthorst, Peebles and Baring are within the rural municipality. The rural municipality in conjunction with the provincial government is in charge of maintenance of highways in its area. As well, the municipality provides policing, fire protection and municipal governance for the rural district, with a reeve as its administrator.
There is one designated heritage building located within the rural municipality:
Clemence Schmitz Residence - The residence was constructed by Peter Schmitz who homesteaded in the area north west of Windthorst. in 1903. The residence include a small chapel. The building is currently being converted into a museum.