Sannantha cunninghamii is a species of flowering plant in the myrtle family, Myrtaceae and is endemic to eastern New South Wales.

It is a shrub with round to broadly elliptic leaves with irregular edges, and white flowers arranged singly, in pairs or groups of three in leaf axils.

Sannantha cunninghamii is a shrub that typically grows to a height of up to 1.5 m (4 ft 11 in), its young stems grey or reddish.

[2][3] This species was first formally described in 1843 by Johannes Schauer who gave it the name Harmogia cunninghamii in Walpers' book Repertorium Botanices Systematicae.

[6] This species of sannantha grows in forest and shrubby woodland between the Pilliga Scrub the Hunter Valley and the Cowra district in eastern inland New South Wales.