Prostanthera verticillaris is a species of flowering plant in the family Lamiaceae and is endemic to a restricted area of Western Australia.

It is a spreading shrub with whorled, egg-shaped to elliptic leaves and white to purplish-blue flowers.

[2][3] Prostanthera verticillaris was first formally described in 1988 by Barry Conn in the journal Nuytsia from specimens collected by Kenneth Newbey north-east of Albany in 1967.

[2][4] This mintbush grows on granite outcrops and is only known from the type location in the Esperance Plains biogeographic regions of Western Australia.

[2][3] Prostanthera verticillaris is classified as "Priority One" by the Government of Western Australia Department of Parks and Wildlife,[3] meaning that it is known from only one or a few locations which are potentially at risk.