Oʻahu Forest National Wildlife Refuge was established in 2000 to protect fish, wildlife, and plants which are listed as threatened or endangered species. The refuge encompasses approximately 4,525 acres (18.31 km2) and is managed by the U.S. Fish & Wildlife Service.
The Refuge is located on the upper slopes of the northern Koʻolau Range, on the island of O'ahu.
O'ahu Forest National Wildlife Refuge is home to at least four species of endangered pupu kani oe (O'ahu tree snails), 15 endangered plant species, and many native birds, including the O'ahu 'elepaio, 'i'iwi, pueo, and native honeycreepers.