Grevillea manglesii is a species of flowering plant in the family Proteaceae and is endemic to an area around Perth in Western Australia.

It is a spreading shrub with divided leaves, with triangular or linear lobes, and clusters of cream-coloured or white flowers.

Flowering period depends on subspecies, and the fruit is an oblong to oval follicle 7–10 mm (0.28–0.39 in) long.

[6] The species was later described by Robert Graham who gave it the name Anadenia manglesii in the Edinburgh New Philosophical Journal in 1839.

[7] The names of three subspecies are accepted by the Australian Plant Census: Grevillea manglesii grows on granite outcrops and on roadsides near Perth in the Avon Wheatbelt, Jarrah Forest, Swan Coastal Plain and Warren bioregions of south-western Western Australia.