Grevillea kedumbensis is a shrub which is endemic to a restricted locale in the Great Dividing Range in central New South Wales in Australia. First collected by Alec Blombery in 1986, Grevillea kedumbensis was described by Don McGillivray as a subspecies of Grevillea obtusiflora in 1986. Peter Olde and Neil Marriott raised it to species rank in 1994. They reported that the similarities in form of the plants with the Picton form of Grevillea mucronulata suggests as close a relationship with that species as with G. obtusiflora.