Acacia baileyana, commonly known as Cootamundra Wattle, is a shrub or tree in the genus Acacia. The scientific name of the species honours the botanist Frederick Manson Bailey. It is indigenous to a small area of southern New South Wales in Australia, but it has been widely planted in other Australian states. In many areas of Victoria, Cootamundra Wattle has become naturalised and is regarded as a weed, out-competing indigenous Victorian species.

Almost all wattles have cream to golden flowers. The small flowers are arranged in spherical to cylindrical inflorescences, with only the stamens prominent. Wattles have been extensively introduced into New Zealand.