North Dundas is located within the National Capital Region, approximately 50 km south of downtown Ottawa, midway between Ottawa and Morrisburg. It is primarily rural with a few small villages. It is spread across the South Nation River and the East Castor River watersheds.
The township was established in 1998, with the amalgamation of the former Townships of Winchester and Mountain and the Villages of Chesterville and Winchester.
Most family history material will be found under the names of the original townships.