Marionville is a dispersed rural community in Russell Township, Ontario, located on the border with the City of Ottawa and North Dundas. The community is located about 750m northwest of the East Castor River.
The population of the blocks surrounding the community was 238 according to the Canada 2011 Census.
Marionville is situated approximately 37 kilometres southeast of Downtown Ottawa (45 km by road).
Coordinates: 45°11′03″N 75°21′00″W / 45.1843°N 75.3500°W