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.