Lithocarpus muluensis is a tree in the beech family Fagaceae. It is named for Gunung Mulu mountain in Sarawak, Borneo.
Lithocarpus muluensis grows as a tree up to 30m (100feet) tall with a trunk diameter of up to 75cm (30inches). The bark is flaky. Its coriaceous leaves measure up to 17cm (07inches) long. Flowers are unknown. Its brown acorns are roundish and measure up to 2.50NaN0 across.
Lithocarpus muluensis is endemic to Borneo, where it is confined to Gunung Mulu National Park in Sarawak. Its habitat is mixed dipterocarp to montane forest, up to 1500m (4,900feet) elevation.