牧豆树（学名：Prosopis juliflora）为豆科牧豆树属下的一个种。

Prosopis juliflora (Spanish:bayahonda blanca) is a shrub or small tree in the Fabaceae family, a kind of mesquite. It is native to Mexico, South America and the Caribbean. It has become established as an invasive weed in Africa, Asia, Australia and elsewhere.