Grevillea maxwellii is a shrub which is endemic to the south west region of Western Australia. It grows to between 0.2 and 1.2 metres in height. The flowers, which have a pink-orange or pink-red perianth and pink-red style, appear in May and from September to November in the species native range.The species was first formally described by Donald McGillivray in 1986, his description published in New Names in Grevillea (Proteaceae). It is classified as "Declared Rare Flora" under the Wildlife Conservation Act in Western Australia.