Casselman is a village in eastern Ontario, Canada, in the United Counties of Prescott and Russell.

Situated on the South Nation River about 55 km (34 mi) southeast of downtown Ottawa, along the Trans-Canada Highway 417.

The village was named after Martin Casselman who built a sawmill near the site of the current town in 1844.

[2] The village installed modern water and sewer services that became operational in 1977.

Casselman hosted L'écho d'un peuple, at Ferme Drouin, one of the biggest shows ever presented in Ontario, until the organization ran into financial trouble in 2008.