The Rural Municipality of Rosser is located in south central Manitoba, and is conveniently located adjacent to the northwest boundary of Manitoba's capital city, Winnipeg. The municipality is situated along Provincial Trunk Highway 6, and Winnipeg's Perimeter Highway.
Rosser, Grosse Isle, Meadows, and Marquette are small communities in the municipality. Gordon, Lilyfield and Little Mountain form other significant communities in the municipality.
The municipality does not have a particular central urban centre, thus making Rosser uniquely "a community of communities".