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.

[2] The RM contains the southern part of Manitoba's Brightstone Sand Hills Provincial Forest and the northern part of Agassiz Provincial Forest, although most of these forests lie in other RMs.