The Strickland River is a major river in the Western Province of Papua New Guinea. It is the longest and largest tributary of the Fly River with a total length of 824 km including the Lagaip River the farthest distance river source of the Strickland River. It was named after Edward Strickland, vice-president of the Geographical Society of Australasia by the New Guinea Exploration Expedition of 1885.

Tributary

Strickland River List of tributaries by length.

Environmental concerns

The Porgera Gold Mine, run by Barrick Gold, is a mine near Strickland, which is the source of environmental concerns in the area. Since 1992, Barrick Gold has dumped mine waste, particularly metal particulates or tailings, directly into the river. This process of riverine disposal by the mine has led to much controversy, with numerous deaths and environmental problems being blamed on the metal particulates.