Chionanthus leopoldii is a flowering plant in the family Oleaceae. It is native to Borneo.
Chionanthus leopoldii grows as a tree up to tall, with a trunk diameter of up to . The bark is greyish. The flowers are pale greenish. The fruit is purple or red-brown when ripe, round, up to in diameter.
Chionanthus leopoldii is endemic to Borneo, where it is confined to Sabah. Its habitat is mixed dipterocarp forests from altitude.