Acacia baileyana or 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 and territories. In many areas of Victoria, it has become naturalised and is regarded as a weed, out-competing indigenous Victorian species.