Acacia echinula, commonly known as hedgehog wattle, is a shrub belonging to the genus Acacia and the subgenus Phyllodineae that is endemic to New South Wales. The intricate multi-branched shrub typically grows to a height of 2 m (6 ft 7 in) and has hairy branchlets with 1 to 2 mm (0.039 to 0.079 in) long stipules. When it blooms it produces yellow coloured flowers. It is found in eastern parts of New South Wales from around Nowra in the south to Grafton in the north on hills and plains in sandy soils often over sandstone as a part of dry sclerophyll forest communities.