Olearia cordata is an aromatic slender shrub with mostly mauve to dark blue daisy-like flowers endemic to New South Wales.

The leaves are narrowly egg-shaped becoming heart shaped near the base and tapering to either a sharp point or rounded.

[2][3][4] Olearia cordata was first formally described by Nicholas Sèan Lander in 1975 and published in the journal Telopea.

[6] This species is endemic to New South Wales in sparsely scattered locations from Wisemans Ferry to Wollombi mostly in National Parks.

[3][4] Olearia cordata is listed as "vulnerable" in New South Wales by the Office of Environment and Heritage and under the Australian Government EPBC Act.