A key is presented to the 10 species comprising the informal "Acacia victoriae group". Five of these species, all from Western Australia, are described as new, namely, A. alexandri, A. aphanoclada, A. chartacea, A. ryaniana and A. synchronicia. Acacia glaucocaesia Domin (syn. A. glabripes Maiden & Blakely, non Domin) is reinstated but may ultimately prove better placed as an infraspecific taxon under A. victoriae Benth. Legumes are described for A. pickardii Tind. and a full description is given for A. dempsteri F. Muell. All species of the group are illustrated.