Its boundaries were created in March 2002 for the “long established name.” The locality is reported as being so named because it is located in the western part of the cadastral unit of the Hundred of Dudley.[1]
^For the 2011 census, the State Suburb of Island Beach covered the full extent of the Dudley Peninsula with the exception of Penneshaw - refer Dudley Peninsula#Demographics for more information
^"AHS – AA609582"(PDF) (PDF). The Australian Hydrographic Service. 5 July 2012. Archived from the original(PDF) on 13 March 2018. Retrieved 30 May 2013.