Spilocuscus wilsoni occurs on Biak and Supiori islands in Indonesian Papua. An adult male found in secondary forest on Biak had brown spots and blotches on its back and sides, a beige belly, and blue-green eyes.
An adult male recorded on Biak had brown spots and blotches on the back and sides, a plain beige underside, and blue-green eyes.
A field report found an adult male in secondary forest around Warsa village in northern Biak.
An extinction-risk assessment has not been added yet.