三棱栎（学名：Trigonobalanus doichangensis）为壳斗科三棱栎属下的一个种。

Trigonobalanus doichangensis (syn. Formanodendron doichangensis) is a species of tree in the Fagaceae family that can reach 21 metres (69 ft) in height. It is only found at few sites in Yunnan in China and at one site in Chiang Rai in Thailand. It is threatened by habitat loss and degradation. In China it is under second-class national protection.