Homoranthus thomasii is a species of flowering plant in the family Myrtaceae and is endemic to Queensland.

The greyish-green leaves are arranged opposite, thick, spoon-shaped, fragrant, 0.6–1.5 cm (0.24–0.59 in) long and ending in a recurved point at the apex.

This species was first formally described in 1864 by Ferdinand von Mueller who gave it the name Chamelaucium thomasii and published the description in the journal Fragmenta phytographiae Australiae.

[8] The specific epithet (thomasii) honours the Melbourne doctor David John Thomas (1813–1871).

[10] Although widely distributed, H. thomasii is of sporadic occurrence and was considered rare by Briggs and Leigh (1996).