Mattawan is a municipality in the Canadian province of Ontario. Located in the Nipissing District, the municipality had a population of 161 in the Canada 2016 Census. The municipality has no named communities within its boundaries; all addresses within the municipality are rural routes assigned to the neighbouring town of Mattawa. Its main access road is Highway 533, with Highway 656 as a short branch leading to the Otto Holden Generating Station on the Ottawa River. In 2007, Mattawan, along with the town of Mattawa and the townships of Papineau-Cameron, Bonfield and Calvin cooperated to create a newly branded Mattawa Voyageur Country tourist region in order to promote the area.

Demographics

In the 2021 Census of Population conducted by Statistics Canada, Mattawan had a population of 153 living in 71 of its 102 total private dwellings, a change of NaN% from its 2016 population of 161. With a land area of 200.12 km2, it had a population density of in 2021.