Haplaxius is a genus of cixiid planthoppers in the family Cixiidae.

There are at least 60 described species in Haplaxius.

[1][2][3][4] Haplaxius crudus is the vector of the coconut lethal yellowing plant disease.

These 62 species belong to the genus Haplaxius: Data sources: i = ITIS,[5] c = Catalogue of Life,[1] g = GBIF,[2] b = Bugguide.net[3]