19 January – The last edition of The Argus newspaper is published.
29 July – The Bega bombing occurs in Bega, New South Wales when Senior Constable Kenneth Desmond Coussens (31), his wife Elizabeth (34) and 7-month-old son Bruce are instantly killed by a bomb placed on their home's veranda. The house was demolished by the explosion at about 2 AM. 8-year-old Roger McCampbell, Coussens step-son, survived. A six-gallon metal cream container filled with 240 sticks of gelignite, stolen from a mine, was placed there by Myron Bertram Kelly. Coussens dealt with Kelly regarding traffic offences and issued him several traffic fines. Kelly appears to have become angered because Coussens issued further fines and defect notices regarding Kelly's tractor and rotary hoe. On 6 December 1957 Justice McClemens sentenced Kelly to life imprisonment for the 3 murders.[1]
15 September – Hobart has its wettest day on record with 156.2 millimetres as a result of a slow-moving low pressure system redeveloping over the Tasman Sea[2]