1966 in Australia

Incumbents

• Monarch – Elizabeth II
• Governor-General – The Lord Casey
• Prime Minister – Sir Robert Menzies (until 26 January), then Harold Holt

State Premiers

• Premier of New South Wales – Jack Renshaw (until 1 May), then Robert Askin
• Premier of Queensland – Sir Francis Nicklin
• Premier of South Australia – Frank Walsh
• Premier of Tasmania – Eric Reece
• Premier of Western Australia – David Brand
• Premier of Victoria – Henry Bolte

State Governors

• Governor of New South Wales – Sir Roden Cutler (from 20 January)
• Governor of Queensland – Sir Henry Abel Smith (until 18 March), then Sir Alan Mansfield (from 21 March)
• Governor of South Australia – Sir Edric Bastyan
• Governor of Tasmania – Sir Charles Gairdner
• Governor of Western Australia – Sir Douglas...... ...
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