Opasatika is a township in the Canadian province of Ontario, located in the Cochrane District on the Opasatika River, a tributary of the Missinaibi River. Its name is of indigenous origin, meaning "surrounded by poplar". The main communities in the township are Opasatika and Lowther, both located along Highway 11 between Mattice and Harty. The ghost town of Reesor Siding, site of the 1963 Reesor Siding incident, is at the western edge of the township. The former Canadian Forces Station Lowther was located in the municipality.

Demographics

In the 2021 Census of Population conducted by Statistics Canada, Opasatika had a population of 200 living in 101 of its 110 total private dwellings, a change of NaN% from its 2016 population of 226. With a land area of 327.09 km2, it had a population density of in 2021. Mother tongue (2021):