Located in the Almaguin Highlands region of Parry Sound District, the township surrounds but does not include the village of Sundridge.

The township includes the communities of Hartfell, Kennedys, Lake Bernard, Pevensey, Stirling Falls and Strong.

It surrounds Lake Bernard, which is claimed to be the world's largest freshwater lake without an island.

[2] In the 2021 Census of Population conducted by Statistics Canada, Strong had a population of 1,566 living in 660 of its 953 total private dwellings, a change of 8.8% from its 2016 population of 1,439.

With a land area of 158.88 km2 (61.34 sq mi), it had a population density of 9.9/km2 (25.5/sq mi) in 2021.