 The locality's boundaries which were created in March 2002 include the former government town of Sapphiretown.The name is derived from HMS "Sapphire", a sloop, which conveyed Jervois to South Australia in October 1877 to take up his appointment as Governor of South Australia.As of 2014, Sapphiretown consisted of land at the western end of Dudley Peninsula and which concludes as a spit known as Strawbridge Point at its north-western extremity and which is bounded to the north by Eastern Cove in Nepean Bay and by the body of water known as American River to the west.