This paper describes the importance of fungi to Canadian Indigenous Peoples. Based on collaborative research with Indigenous knowledge holders and a review of literature, approximately 30-40 fungi are documented as having cultural roles for Canadian Indigenous groups. Some peoples have not eaten mushrooms traditionally, whereas others have a history of harvesting, cooking, storing and trading mushrooms as part of their diets. Perennial tree fungi have application as tinder, fire starter, and for carving masks. They also have a range of medicinal uses, some being consumed as medicinal teas, and others applied externally, in some cases by moxibustion to relieve underlying pain. Puffballs also have a range of material and medicinal applications, especially for stopping haemorrhages. Fungi are widely known for spiritual or sacred associations, and play key roles in rituals, ceremonies, stories and beliefs, which are also reflected in the names of some species. The antiquity of peoples’ relationships with fungi is likely very deep, extending back to ancient Asian or European ancestors of Pleistocene times, whose descendants on those continents have used them in similar ways. Fungi continue to play important roles for Indigenous Peoples today, with some being harvested commercially, and many still used in traditional ways.