Denison Mines Corp. is a Canadian uranium exploration, development, and production company.

Founded by Stephen B. Roman, and best known for its uranium mining in Blind River and Elliot Lake, it later diversified into coal, potash, and other projects.

About 1,000 workers at Denison's Elliot Lake mines went on strike in 1974, protesting unhealthy working conditions.

[10] Denison also manages decommissioned uranium mines in the Elliot Lake area.

[12] In January 2017 Denison announced it had executed an agreement to increase ownership of the Wheeler River Uranium Project in the Athabasca Basin to 66%.