Calvin is a township in northeastern Ontario, Canada on the Mattawa River in Nipissing District. The township took its name from Delino Dexter Calvin, an Ontario lumber merchant and MPP based in Frontenac County. In 2007, Calvin, along with the town of Mattawa and the townships of Papineau-Cameron, Mattawan and Bonfield cooperated to create a newly branded Mattawa Voyageur Country tourist region in order to promote the area.

Communities

The township comprises the communities of Eau Claire and Eau Claire Station.

Demographics

In the 2021 Census of Population conducted by Statistics Canada, Calvin had a population of 557 living in 227 of its 263 total private dwellings, a change of NaN% from its 2016 population of 516. With a land area of 140.13 km2, it had a population density of in 2021.