Rideau Township, historically part of eastern Ontario, Canada, became part of the City of Ottawa in 2001. Its formation in 1974 was a result of amalgamating Marlborough and North Gower townships, along with parts of Long Island. The township is defined by its rural character and the Rideau River, which forms its eastern boundary. Communities within Rideau include Manotick, North Gower, Kars, and Burritts Rapids. As of the 2006 census, Rideau had a population of 12,960, reflecting a small growth since 2001. The area is known for its scenic landscapes and proximity to Ottawa's urban amenities.