Grevillea triternata is species of flowering plant in the family Proteaceae and is endemic to New South Wales.

It is a dense, compact shrub with divided leaves, the end lobes sharply pointed, linear to narrowly triangular, and cylindrical clusters of white flowers with a cream-coloured to pale yellow style.

Grevillea triternata is a dense, compact shrub that typically grows to a height of 0.2–1 m (7.9 in – 3 ft 3.4 in).

[2][3][4] Grevillea triternata was first formally described in 1830 by Robert Brown in Supplementum primum Prodromi florae Novae Hollandiae from specimens collected on mountains near Port Jackson.

[4] This grevillea grows in forest and woodland in sandy soil in scattered populations in New South Wales, from the upper Hunter River and Bathurst to Coonabarabran and the Pilliga Scrub as well as on the Northern Tablelands.