North Grenville is a township in eastern Ontario, Canada, in the United Counties of Leeds and Grenville on the Rideau River. It is located just south of Ottawa in Canada's National Capital Region. It was established on January 1, 1998, through the amalgamation of Oxford-on-Rideau Township, South Gower Township, and the Town of Kemptville. In 2003, a motion of the municipal council adopted the designation of 'municipality'.