Lake Argyle is Western Australia's largest and Australia's second largest freshwater man-made reservoir by volume. The reservoir is part of the Ord River Irrigation Scheme and is located near the East Kimberley town of Kununurra. The lake flooded large parts of the Shire of Wyndham-East Kimberley on the Kimberley Plateau about 80 kilometres (50 mi) inland from the Joseph Bonaparte Gulf, close to the border with the Northern Territory.

The Ord River is a 651-kilometre long (405 mi) river in the Kimberley region of Western Australia. The river's catchment covers 55,100 square kilometres (21,274 sq mi).