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'.

The largest community in North Grenville is Kemptville, with a population of 3,911 in the 2016 census, up from 3,620 in the Canada 2011 Census. It is located on the Kemptville Creek (historically South Branch of the Rideau River) approximately 56 km (35 mi) south of Ottawa, sitting midway between suburban Ottawa and the Ogdensburg–Prescott International Bridge along Highway 416.

The municipality comprises the communities of Actons Corners, Bedell, Bishops Mills, Burritts Rapids (the oldest community on the Rideau River), East Oxford, Heckston, Hutchins Corners, Kemptville, McReynolds, Millars Corners, Mountain, Newmanville, Oxford Mills, Oxford Station, Pattersons Corners, Peltons Corners, Sabourins Crossing, Schipaville, Swan Crossing and Van Allens. The administrative offices of the municipality are located in Kemptville.

In the 2021 Census of Population conducted by Statistics Canada, North Grenville had a population of 17,964 living in 7,038 of its 7,244 total private dwellings, a change of 9.2% from its 2016 population of 16,451. With a land area of 351.9 km (135.9 sq mi), it had a population density of 51.0/km (132.2/sq mi) in 2021.

• List of francophone communities in Ontario
• List of townships in Ontario
• North Grenville District High School

• Official website