Mississagi Provincial Park is a natural environment-class provincial park north of Elliot Lake, in Algoma District, Ontario, Canada. It lies on the Boland River, a tributary of the Little White River, which is itself a tributary of the Mississagi River. The park is accessed via Highway 639.

The park has a rugged landscape of ancient hills and clear lakes with seven hiking trails. Together with surrounding areas, it offers more than of trails that cross the rugged Penokean Hills.

It is an operating park requiring a permit for day and overnight use. Facilities include a total of 72 campsites (car accessible and walk-in backcountry sites), an amphitheatre, boat launches and docks (on Semiwite Lake and Flack Lake), park store, and picnic shelter. The park is used for recreational activities such as biking, boating, canoeing, fishing, hiking, swimming, and hunting. However, due to objections from the city of Elliot Lake, a one-year pilot project was initiated in which Ontario Parks would work with the city of Elliot Lake to continue operations at Mississagi Provincial Park with the goal of increasing revenue and visitation rates. Through this agreement, the park continued to provide camping and other services during the 2013 season.

Since 2013, the park has continued to provide day-use and overnight camping for the duration of the summer seasons, and remains up and running.

Flora and fauna

Forest in the park is transitional, between the boreal forest to the north and the Great Lakes–St. Lawrence forest to the south.