Micromyrtus stenocalyx is a species of flowering plant in the family Myrtaceae and is endemic to the inland of Western Australia.

It is a straggly or widely spreading shrub with oblong or club-shaped leaves pressed against the stem, and cream-coloured to yellow flowers with 10 stamens.

[2][3] This species was first formally described in 1876 by Ferdinand von Mueller who gave it the name Thryptomene stenocalyx in his Fragmenta Phytographiae Australiae from specimens collected at Queen Victoria Spring by Jess Young.

[6] Micromyrtus stenocalyx grows on sand dunes and sandplains in the Coolgardie, Great Victoria Desert and Murchison bioregions of inland Western Australia.

[3] Thie species of micromyrtus is listed as "not threatened" by the Western Australian Government Department of Biodiversity, Conservation and Attractions.