Acacia ingrata is a shrub belonging to the genus Acacia and the subgenus Phyllodineae that is endemic to south western Australia.
The diffuse, spreading, multi-stemmed and pungent shrub typically grows to a height of 0.15to. It has light grey coloured bark on glabrous to lightly haired branchlets with persistent stipule bases appearing as tooth-like projections. The sessile, patent to slightly reflexed, green phyllodes have a narrowly triangular to narrowly oblong shape with a length of and a width of with an obscure midrib. It produces cream-white flowers from September to January. The inflorescences occur on one or two headed racemes that have an axes length of . The sparse spherical flower-heads contain five to seven cream to white flowers. The seed pods resemble a string of beads and have a length of up to and a width of . the pods contain dull dark brown seeds with an elliptic shape that are long.
It is native to an area along the coast in the South West and Goldfields-Esperance regions of Western Australia where it grows in gravelly lateritic clay-loam and sandy soils. The bulk of the population is found on the south coast between Mid Mount Barren near Ravensthorpe in the west and Young River in the east[1] with an isolated population found on the west coast around Busselton.