Leucopogon tetragonus is a species of flowering plant in the family Ericaceae, and is endemic to the south of Western Australia.

It is a robust shrub with crowded, often decussate, oblong to lance-shaped leaves and short, dense spikes of white, tube-shaped flowers.

The flowers are borne on the ends of branches in short, dense spikes.

[2][3] Leucopogon tetragonus was first formally described in 1845 by Otto Wilhelm Sonder in Lehmann's Plantae Preissianae from specimens collected near Cape Riche in 1840.

[6] This leucopogon grows on rocky ridges and breakaways in shallow soil in the Esperance Plains bioregion of southern Western Australia.