West Montrose is a village in the Township of Woolwich in the Region of Waterloo, Ontario, Canada. West Montrose straddles the Grand River, one of Canada's historic rivers.Together with nearby St. Jacobs, Ontario and Elmira, Ontario, West Montrose lies in the heart of an area where there is a historically large settlement of Old Order Mennonites noted for their traditional customs, dress and use of horse and buggies.