Gonystylus bancanus is a species of tree in the family Thymelaeaceae, growing to over 40m (130feet) tall.
Gonystylus bancanus is native to Borneo, Sumatra, Peninsular Malaysia and Singapore. Its habitat is in lowland swamp forest.
Gonystylus bancanus has been assessed as Critically Endangered on the IUCN Red List. Past excessive timber extraction has left populations reduced. The species is also threatened by habitat loss from the development of palm oil plantations.