Grevillea obliquistigma is a shrub of the genus Grevillea native to an area in the Wheatbelt, Mid West and Goldfields-Esperance regions of Western Australia. The spreading shrub typically grows to a height of 0.3 to 4 metres (1 to 13 ft) and has non-glaucous branchlets. It has simple linear leaves with a blade that is 50 to 220 millimetres (2.0 to 8.7 in) in length and 1 to 2 mm (0.04 to 0.08 in) wide. It blooms from July to December and produces a terminal or axillary raceme irregular inflorescence with white, yellow or cream flowers. Later it forms smooth ellipsoidal glabrous fruit that is 5 to 15 mm (0.2 to 0.6 in) long.