Crotty Dam also known earlier as the King River Dam is an 82metre high concrete faced rock and gravel fill dam in Western Tasmania. It is one of two dams that contain Lake Burbury, which forms the headwaters for the King River Hydroelectric Power Development on Tasmania's West Coast. The other is Darwin Dam.
The dam is located in the upper reaches of the King River gorge where the river breaks through the West Coast Range. It captures the high rainfall in the catchment of the King River and allows diversion of water through a tunnel to the John Butters Power Station some 8 kilometres downstream of the dam.