Wahwashkesh Lake is a lake in Whitestone, Parry Sound District, Ontario, Canada, and is the largest lake in Parry Sound District, with a surface area of 1,721 hectares (4,253 acres) and over 106 km of shoreline. Approximately 30% of the shoreline property is Crown Land. The lake has two distinct basins: (1) the north basin or Top Lake is the smaller of the two, and (2) the south basin is the Big Lake.