Acacia lachnophylla is a shrub belonging to the genus Acacia and the subgenus Phyllodineae. It is native to an area in the southern Wheatbelt and Goldfields-Esperance regions of Western Australia. The spreading often domed shrub typically grows to a height of 0.1 to 1.0 metre (0.3 to 3.3 ft) and produces yellow flowers from August to October.