The Western Australian species of subtribe Persooniinae (Proteaceae: Persoonioideae: Persoonieae) are revised. The history of taxonomic work on the Persooniinae is reviewed and evidence for the monophyly of the subtribe evaluated. The balance of evidence supports the monophyly of the Persooniinae but not the generic level classification proposed by Johnson & Briggs. The generic classification presented here recognises three monotypic genera, Garnieria, Toronia, and Acidonia, and the large genus Persoonia. Morphological terminology used in the descriptions is reviewed and defined. A key and descriptions of all 43 species are presented. Seventeen new species are described: