Acacia delphina is a shrub belonging to the genus Acacia and the subgenus Phyllodineae. It is native to an area along the south coast in the Great Southern and Goldfields-Esperance regions of Western Australia. The diffuse shrub typically grows to a height of 0.3 to 1.0 metre (1 to 3 ft). It blooms from July to October and produces yellow flowers.