The 20 Recent species and 1 fossil subspecies of the Eatoniellidae in Australia are reviewed, and 13 are described as new. The shells, radulae and opercula and, in some cases, the external appearance of the head-foot, are described and the distribution and habitat of each species is given. The species fall into 2 genera, Eatoniella Dall (with 2 subgenera, Eatoniella s.s. and Albosabula Ponder) and Crassitoniella Ponder. A list of the known species of the Eatoniellidae is given (with the exception of the New Zealand species). Replacement names are provided for Eatoniella maculosa Ponder, 1965 and Rissoina pellucida Preston, 1905.