Ilex promecophylla is a tree in the family Aquifoliaceae, native to Borneo. The specific epithet promecophylla means 'oblong leaves'.
Ilex promecophylla grows up to 25m (82feet) tall. The bark is smooth. The leathery leaves are obovate to oblong and measure up to long, occasionally to long. The inflorescences, in, feature greenish to white flowers. The roundish fruits are red.
Ilex promecophylla is endemic to Borneo. It is present in some protected areas, including Lambir Hills National Park in Sarawak. Its habitat is forests on hills and ridges, at elevations to around .