合欢属（学名：Albizia）是豆科下的一个属，为乔木或灌木植物。该属共有约100种，分布于全世界的热带和亚热带地区。

Albizia is a genus of about 150 species of mostly fast-growing subtropical and tropical trees and shrubs in the subfamily Mimosoideae of the family Fabaceae. The genus is pantropical, occurring in Asia, Africa, Madagascar, America and Australia, but mostly in the Old World tropics. In some locations, some species are considered weeds.