Grevillea phillipsiana is a shrub of the genus Grevillea native to a few small scattered areas in the Goldfields-Esperance region of Western Australia. The prickly shrub typically grows to a height of 0.5 to 1.5 metres (2 to 5 ft) and has non-glaucous branchlets. It has simple flat linear undissected leaves with a blade that is 12 to 50 millimetres (0.5 to 2.0 in) long and 0.5 to 1.5 mm (0.02 to 0.06 in) wide. It blooms from July to September and produces an terminal raceme irregular inflorescence with red flowers and red styles. Later it forms ovoid or ellipsoidal simple hairy fruit that is 15 mm (0.6 in) long.