Cacatua tenuirostris is listed in the following regions:
Canberra & Southern Tablelands | Southern Highlands | Albury, Wodonga | South Coast | Riverina Murray | Hume | Greater Melbourne | Gippsland | Barwon South West | Grampians | Loddon Mallee | Greater Brisbane | Wide Bay | Townsville | Tasmania | South East South Australia | South West Western Australia