|Main source||180 metres (591 ft)|
31 metres (102 ft)
|Length||153 kilometres (95 mi)|
|Basin size||1,631 square kilometres (630 sq mi)|
The river rises between the Durack Range and the O'Donnell Range then flows north-west parallel with the Great Northern Highway to the east and the Bedford Stock Route to the west. The river then crosses the Great Northern Highway near Cabbage Tree Creek and continues north-west crossing the Victoria Highway and discharging into the Ord River west of Kununurra.
There are five tributaries of the Dunham; Cabbage Tree Creek, Pelican Creek, Macphee Creek, Rabbit Creek and Pumpkin Lookout Creek.
The river flows through one permanent waterhole, Flying Fox waterhole, toward the end of its journey.
The river is prone to flooding during rain events. In March 2000, the peak flow of the river was estimated at 2700 m3 s−1 during floods.
The river was named in 1882 by explorer and Kimberley pioneer Michael Durack after the clergyman, Father Dunham of Brisbane, who in 1871 was the first priest to visit Cooper Creek in outback Queensland.
- Western Australian Land Information Authority. "History of river names". Archived from the original on 16 February 2015. Retrieved 7 December 2008.
- "Bonzle Digital Atlas - Map of Dunham River, WA". 2008. Retrieved 7 December 2008.
- "Western Australian Department of Water - Water Resources Data - Streamflow Sites". 2008. Retrieved 7 December 2008.
- "Ord river historic flows:Assessment of the impacts of regulations on flooding" (PDF). 2001. Retrieved 26 April 2009.