Lac du Bonnet is a rural municipality in the province of Manitoba in Western Canada, situated between the Nopiming Provincial Park to the northeast and Whiteshell Provincial Park to the southeast. The separately-administered town of Lac du Bonnet lies within the borders of the municipality. It also mostly encircles the Pinawa local government district in the municipality's southeast part. A large portion of the municipality includes waters of the Winnipeg River and its tributaries.