Poissonia is a genus of flowering plants in the legume family, Fabaceae.

It includes five species of trees, shrubs, and herbs native to Peru, Bolivia, and northwestern Argentina.

Typical habitats include seasonally-dry tropical and subtropical forest and shrubland, generally along river and stream banks, and open vegetation in arid areas.

[1] It belongs to the subfamily Faboideae, tribe Robinieae.

[2] As of September 2023[update], Plants of the World Online accepted the following species:[1] This Faboideae-related article is a stub.