The Boano monarch (Symposiachrus boanensis), or black-chinned monarch, is a species of bird in the family Monarchidae endemic to Indonesia.

It is found on Boano island in the southern Mollucas.

Its natural habitats are subtropical or tropical moist lowland forest and subtropical or tropical moist shrubland.

This species was originally described as a subspecies of the spectacled monarch and then classified as a separate species in the genus Monarcha until moved to Symposiachrus in 2009.

This Monarchidae-related article is a stub.