By-elections, appointments and defections

By-elections and appointments

• On 24 August 1910, Sir Robert Best (Liberal) was elected to replace William Knox (Liberal) as the member for Kooyong.
• On 8 February 1911, Frank Brennan (Labour) was elected to replace Henry Beard (Labour) as the member for Batman.
• On 11 March 1911, Granville Ryrie (Liberal) was elected to replace George Edwards (Liberal) as the member for North Sydney.
• On 11 November 1911, David Gordon (Liberal) was elected to replace Lee Batchelor (Labour) as the member for Boothby.
• On 1 June 1912, Benjamin Bennett (Labor) was elected to replace David Hall (Labor) as the member for Werriwa.
• On 31 July 1912, John Shannon (Liberal) was appointed as a South Australian Senator to replace William Russell (Labor).

Defections

• Liberal Senator Cyril Cameron (Tasmania) lost pre-selection and contested the election as an Independent.