Acacia mackeyana is a shrub of the genus Acacia and the subgenus Plurinerves. It is native to an area in the Mid West, Wheatbelt, Great Southern and Goldfields-Esperance regions of Western Australia. The dense pungent shrub typically grows to a height of 0.5 to 1.7 metres (2 to 6 ft). It blooms from June to August and produces yellow flowers.