Grevillea oligomera is a shrub of the genus Grevillea native to an area in the Wheatbelt and Goldfields-Esperance regions of Western Australia. The erect shrub typically grows to a height of 1.2 to 2 metres (4 to 7 ft) and has non-glaucous branchlets. It has simple dissected leaves with a blade that is 30 to 110 millimetres (1.2 to 4.3 in) in length. It blooms from July To November and produces a terminal or axillary raceme irregular inflorescence with pink or red flowers. Later it forms viscid subglobose hairy glandular fruit that is 7 mm (0.3 in) long.