Castanopsis lucida is a tree in the family Fagaceae. The specific epithet ' is from the Latin meaning 'shining', referring to the leaf surface.
Castanopsis lucida grows as a tree up to tall with a trunk diameter of up to . The brown bark is glabrescent, lenticellate, fissured or occasionally smooth. The coriaceous leaves measure up to long. Its ovoid nuts measure up to long.
Castanopsis lucida grows naturally in Borneo, Peninsular Malaysia and Singapore. Its habitat is hill dipterocarp forests up to elevation.
The bark produces tannin. The nuts are considered edible.