Protorhus is a small genus of Afrotropical trees in the family Anacardiaceae.

It is dioecious, with male and female flowers on separate plants.

[1] Protorhus is placed in tribe Rhoeae, subfamily Anacardioideae of the family Anacardiaceae.

The genus Abrahamia with 19 Madagascan taxa was separated from Protorhus in 2004.

(Pell 2004) The species are:[2] Formerly listed;