Acacia forrestiana is a shrub belonging to the genus Acacia and the subgenus Phyllodineae. It is native to a small area on the west coast area in the Wheatbelt region of Western Australia. The erect, open and prickly shrub typically grows to a height of 0.4 to 1.0 metre (1 to 3 ft) and produces yellow flowers from November to December.