Buttonbush is a common name for several plants and may refer to:
Cephalanthus, a genus of shrubs or small trees in the madder family, Rubiaceae, especially: Cephalanthus occidentalis, the common Cephalanthus species in eastern North America Cephalanthus salicifolius, Mexican buttonbush, in western North America Conocarpus, a genus of two species of dense multiple-trunked shrubs or small to medium-sized trees in the family Combretaceae, native to tropical regions
See also Ledaea perditalis, the buttonbush owlet moth Buttonwood, disambiguation page