Olearia trifurcata is a species of flowering plant in the family Asteraceae and is endemic to the south of Western Australia.

It is a dense, upright, tussock-like subshrub with narrowly triangular, grass-like leaves, and white and pale yellow, daisy-like inflorescences.

The heads or daisy-like "flowers" are arranged on the ends of branches and are sessile with a narrowly conical or oval involucre at the base.

[2][3] Olearia trifurcata was first described in 2008 by Nicholas Sèan Lander in the journal Nuytsia from specimens collected by William Archer near Esperance in 1990.

[5] This olearia grows in low shrubland on the edges of salt lakes in the Avon Wheatbelt, Coolgardie and Malle bioregions of southern Western Australia.