Moosomin was a territorial electoral district in North-West Territories, Canada that came into existence by Royal Proclamation in 1885 and was abolished when Alberta and Saskatchewan were created in 1905.
The electoral district was mandated to return a single member to the Legislative Assembly of the Northwest Territories. The electoral district was named after the town of Moosomin, North-West Territories and the town's name sake Chief Moosomin, a well known leader of the Cree in the late 19th century.