First Parliament 1901-03

001. Victoria
Date: 21 January 1903
Cause: Death of Hon Sir Frederick Sargood (FT)
Senator appointed: Robert Reid (FT)

002. Western Australia
Date: 20 May 1903
Cause: Resignation of Norman Ewing (FT)
Senator appointed: Henry Saunders (FT)

003. New South Wales
Date: 8 October 1903
Cause: Resignation of Hon Richard O'Connor (Prot)
Senator appointed: Charles Mackellar (Prot)

Second Parliament 1903-06

No appointments

Third Parliament 1906-10

004. South Australia
Date: 11 July 1907
Cause: Voiding of the election of Joseph Vardon (AS)
Senator appointed: James O'Loughlin (Lab)

Fourth Parliament 1910-13

005. South Australia
Date: 31 July 1912
Cause: Death of William Russell (ALP)
Senator appointed: John Shannon (Lib)

Fifth Parliament 1913-14

No appointments

Sixth Parliament 1914-17

006. Tasmania
Date: 1 March 1917
Cause: Resignation of Rudolph Ready (ALP)
Senator appointed: Hon John Earle (Nat)

Seventh Parliament 1917-19

007. South Australia
Date: 24 May 1917
Cause: Resignation of William Story (Nat)
Senator appointed: James Rowell (Nat)

008. Tasmania
Date: 15 January 1919
Cause: Resignation of James Long (ALP)
Senator appointed: Edward Mulcahy (Nat)

Eighth Parliament 1919-22

009. South Australia
Date: 16 February 1921
Cause: Death of Robert Guthrie (Nat)
Senator appointed: Edward Vardon (Nat)

010. New South Wales
Date: 15 December 1921
Cause: Resignation of Hon Herbert Pratten (Nat)
Senator appointed: Henry Garling (Nat)

011. Queensland
Date: 26 May 1922
Cause: Death of John Adamson (Nat)
Senator appointed: John MacDonald (ALP)

Ninth Parliament 1922-25

012. Tasmania
Date: 19 September 1923
Cause: Death of Thomas Bakhap (Nat)
Senator appointed: John Hayes (Nat)

013. New South Wales
Date: 17 October 1923
Cause: Death of Hon Edward Millen (Nat)
Senator appointed: Hon Walter Massy-Greene (Nat)

014. Victoria
Date: 22 July 1924
Cause: Death of Stephen Barker (ALP)
Senator appointed: Joseph Hannan (ALP)

015. New South Wales
Date: 20 November 1924
Cause: Death of Allan McDougall (ALP)
Senator appointed: John Power (ALP)

016. New South Wales
Date: 1 April 1925
Cause: Death of John Power (ALP)
Senator appointed: William Gibbs (ALP)

017. Tasmania
Date: 29 July 1925
Cause: Resignation of George Foster Nat)
Senator appointed: Charles Grant (Nat)

018. Victoria
Date: 25 August 1925
Cause: Death of Hon Edward Russell (Nat)
Senator appointed: William Plain (Nat)

Tenth Parliament 1925-28

019. South Australia
Date: 18 December 1925
Cause: Death of James O'Loughlin (ALP)
Senator appointed: Sir Henry Barwell (Nat)

020. South Australia
Date: 24 February 1926
Cause: Resignation of Benjamin Benny (Nat)
Senator appointed: Alexander McLachlan (Nat)

021. South Australia
Date: 30 August 1927
Cause: Death of Charles McHugh (ALP)
Senator appointed: John Verran (Nat)

022. South Australia
Date: 18 April 1928
Cause: Resignation of Sir Henry Barwell (Nat)
Senator appointed: Albert Robinson (Nat)

023. New South Wales
Date: 5 June 1928
Cause: Death of John Grant (ALP)
Senator appointed: Albert Gardiner (ALP)

024. Queensland
Date: 1 August 1928
Cause: Death of Hon Thomas Givens (Nat)
Senator appointed: John MacDonald (ALP)

Eleventh Parliament 1928-29

025. Victoria
Date: 18 December 1928
Cause: Death of David Andrew (CP)
Senator appointed: Richard Abbott (CP)

Twelfth Parliament 1929-31

026. South Australia
Date: 1 April 1931
Cause: Death of John Chapman (CP)
Senator appointed: Henry Kneebone (ALP)

027. Victoria
Date: 12 May 1931
Cause: Death of Harold Elliott (UAP)
Senator appointed: Thomas Brennan (UAP)

Thirteenth Parliament 1931-34

028. New South Wales
Date: 23 December 1931
Cause: Resignation of Walter Duncan (UAP)
Senator appointed: Patrick Mooney (ALP (NSW))

029. Tasmania
Date: 3 March 1932
Cause: Death of Hon James Ogden (UAP)
Senator appointed: Charles Grant (UAP)

030. Western Australia
Date: 6 April 1933
Cause: Resignation of Hon Sir Hal Colebatch (UAP)
Senator appointed: Herbert Collett (UAP)

Fourteenth Parliament 1934-37

031. Western Australia
Date: 5 March 1935
Cause: Death of Hon Sir Walter Kingsmill (UAP)
Senator appointed: Allan MacDonald (UAP)

032. New South Wales
Date: 26 September 1935
Cause: Death of Lionel Courtenay (UAP)
Senator appointed: James Arkins (UAP)

033. Western Australia
Date: 19 August 1936
Cause: Death of William Carroll (CP)
Senator appointed: Thomas Marwick (CP)

034. Queensland
Date: 2 September 1937
Cause: Death of John MacDonald (ALP)
Senator appointed: Benjamin Courtice (ALP)

035. South Australia
Date: 21 October 1937
Cause: Resignation of Albert Badman (CP)
Senator appointed: Phillip McBride (UAP)

Fifteenth Parliament 1937-40

036. Victoria
Date: 12 July 1938
Cause: Death of Hon John Barnes (ALP)
Senator appointed: James Sheehan (ALP)

Sixteenth Parliament 1940-43

037. Western Australia
Date: 8 October 1942
Cause: Death of Edward Johnston (CP)
Senator appointed: Charles Latham (CP)

Seventeenth Parliament 1943-46

038. South Australia
Date: 10 October 1944
Cause: Resignation of Oliver Uppill (UAP)
Senator appointed: Edward Mattner (UAP)

039. Victoria
Date: 15 May 1946
Cause: Death of Hon Richard Keane (ALP)
Senator appointed: Alexander Fraser (Lib)

Eighteenth Parliament 1946-49

No appointments

Ninteenth Parliament 1949-51

No appointments

Twentieth Parliament 1951-54

040. Western Australia
Date: 7 February 1952
Cause: Death of Richard Nash (ALP)
Senator appointed: Joseph Cooke (ALP)

041. Western Australia
Date: 30 September 1952
Cause: Death of Edmund Piesse (CP)
Senator appointed: William Robinson (CP)

042. Tasmania
Date: 3 March 1953
Cause: Death of John Chamberlain (Lib)
Senator appointed: John Marriott (Lib)

Twenty-First Parliament 1954-55

043. South Australia
Date: 11 October 1955
Cause: Death of Hon George McLeay (Lib)
Senator appointed: Nancy Buttfield (Lib)

Twenty-Second Parliament 1955-58

044. Victoria
Date: 28 August 1956
Cause: Resignation of Hon Sir John Spicer (Lib)
Senator appointed: George Hannan (Lib)

045. Victoria
Date: 6 June 1957
Cause: Death of John Devlin (ALP)
Senator appointed: Charles Sandford (ALP)

046. New South Wales
Date: 30 July 1958
Cause: Death of Hon William Ashley (ALP)
Senator appointed: James Ormonde (ALP)

047. Western Australia
Date: 12 August 1958
Cause: Death of Harrie Seward (CP)
Senator appointed: Thomas Drake-Brockman (CP)

Twenty-Third Parliament 1958-61

048. South Australia
Date: 28 September 1961
Cause: Death of Rex Pearson (Lib)
Senator appointed: Gordon Davidson (Lib)

Twenty-Fourth Parliament 1961-63

049. South Australia
Date: 8 February 1962
Cause: Resignation of Nancy Buttfield (Lib)
Senator appointed: Gordon Davidson (Lib)

050. Queensland
Date: 9 October 1962
Cause: Death of Maxwell Poulter (ALP)
Senator appointed: George Whiteside (ALP)

Twenty-Fifth Parliament 1963-66

051. Western Australia
Date: 26 November 1964
Cause: Death of Victor Vincent (Lib)
Senator appointed: John Sim (Lib)

052. Victoria
Date: 9 December 1964
Cause: Death of Hon Harrie Wade (CP)
Senator appointed: James Webster (CP)

053. New South Wales
Date: 4 August 1965
Cause: Resignation of Hon Sir William Spooner (Lib)
Senator appointed: Robert Cotton (Lib)

054. Western Australia
Date: 17 February 1966
Cause: Death of Hon Sir Shane Paltridge (Lib)
Senator appointed: Reginald Withers (Lib)

055. Queensland
Date: 14 April 1966
Cause: Death of Robert Sherrington (Lib)
Senator appointed: William Heatley (Lib)

056. Victoria
Date: 26 October 1966
Cause: Death of Charles Sandford (ALP)
Senator appointed: Arthur Poyser (ALP)

Twenty-Sixth Parliament 1966-69

057. South Australia
Date: 2 November 1967
Cause: Death of Douglas Hannaford (Ind)
Senator appointed: Condor Laucke (Lib)

058. Victoria
Date: 21 February 1968
Cause: Resignation of Hon John Gorton (Lib)
Senator appointed: Ivor Greenwood (Lib)

059. South Australia
Date: 23 May 1969
Cause: Death of Keith Laught (Lib)
Senator appointed: Martin Cameron (Lib)

Twenty-Seventh Parliament 1969-72

060. Victoria
Date: 19 November 1969
Cause: Death of Samuel Cohen (ALP)
Senator appointed: William Brown (ALP)

061. New South Wales
Date: 6 August 1970
Cause: Resignation of Hon Gerald McKellar (CP)
Senator appointed: Douglas Scott (CP)

062. New South Wales
Date: 16 March 1971
Cause: Death of James Ormonde (ALP)
Senator appointed: James McClelland (ALP)

063. Queensland
Date: 11 June 1971
Cause: Resignation of Hon Dame Annabelle Rankin (Lib)
Senator appointed: Neville Bonner (Lib)

Twenty-Eighth Parliament 1972-74

064. Western Australia
Date: 16 January 1974
Cause: Resignation of Edgar Prowse (CP)
Senator appointed: David Reid (CP)

Twenty-Ninth Parliament 1974-75

065. New South Wales
Date: 27 February 1975
Cause: Resignation of Hon Lionel Murphy (ALP)
Senator appointed: Cleaver Bunton (Ind)

066. Queensland
Date: 3 September 1975
Cause: Death of Bertie Milliner (ALP)
Senator appointed: Albert Field (Ind)

Thirtieth Parliament 1975-77

067. Victoria
Date: 7 December 1976
Cause: Death of Hon Ivor Greenwood (Lib)
Senator appointed: Austin Lewis (Lib)

Thirty-First Parliament 1977-80

068. South Australia
Date: 14 December 1977
Cause: Resignation of Steele Hall (Lib)
Senator appointed: Janine Haines (AD)

069. New South Wales
Date: 26 July 1978
Cause: Resignation of Hon Sir Robert Cotton (Lib)
Senator appointed: Christopher Puplick (Lib)

070. New South Wales
Date: 9 August 1978
Cause: Resignation of Hon James McClelland (ALP)
Senator appointed: Kerry Sibraa (ALP)

071. Victoria
Date: 11 March 1980
Cause: Resignation of Hon James Webster (NCP)
Senator appointed: Laurence Neal (NCP)

072. Tasmania
Date: 15 October 1980
Cause: Resignation of Hon Kenneth Wriedt (ALP)
Senator appointed: Jean Hearn (ALP)

Thirty-Second Parliament 1980-83

073. Western Australia
Date: 11 March 1981
Cause: Resignation of Allan Rocher (Lib)
Senator appointed: John Martyr (Lib)

074. Queensland
Date: 12 March 1981
Cause: Resignation of Dr Glen Sheil (NCP)
Senator appointed: Florence Bjelke-Petersen (NCP)

075. Australian Capital Territory
Date: 5 May 1981
Cause: Death of John Knight (Lib)
Senator appointed: Margaret Reid (Lib)

Thirty-Third Parliament 1983-84

076. Queensland
Date: 22 November 1984
Cause: Resignation of Kathy Martin Sullivan (Lib)
Senator appointed: Warwick Parer (Lib)

Thirty-Fourth Parliament 1984-87

077. Tasmania
Date: 13 March 1986
Cause: Resignation of Peter Rae (Lib)
Senator appointed: Jocelyn Newman (Lib)

078. Victoria
Date: 7 May 1986
Cause: Death of Allan Missen (Lib)
Senator appointed: Richard Alston (Lib)

079. Victoria
Date: 28 August 1986
Cause: Resignation of Hon Donald Chipp (AD)
Senator appointed: Janet Powell (AD)

080. New South Wales
Date: 11 February 1987
Cause: Resignation of Hon Douglas McClelland (ALP)
Senator appointed: Suzanne West (ALP)

Thirty-Fifth Parliament 1987-90

081. Australian Capital Territory
Date: 16 February 1988
Cause: Resignation of Hon Susan Ryan (ALP)
Senator appointed: Robert McMullan (ALP)

082. New South Wales
Date: 4 April 1989
Cause: Resignation of Hon Arthur Gietzelt (ALP)
Senator appointed: John Faulkner (ALP)

083. Tasmania
Date: 9 March 1990
Cause: Resignation of Dr Norman Sanders (AD)
Senator appointed: Robert Bell (AD)

Thirty-Sixth Parliament 1990-93

084. South Australia
Date: 4 April 1990
Cause: Resignation of Janine Haines (AD)
Senator appointed: Meg Lees (AD)

085. South Australia
Date: 7 May 1990
Cause: Resignation of Hon Tony Messner (Lib)
Senator appointed: John Olsen (Lib)

086. Queensland
Date: 8 May 1990
Cause: Resignation of John Stone (NPA)
Senator appointed: Bill O'Chee (NPA)

087. Western Australia
Date: 16 May 1990
Cause: Resignation of Hon Fred Chaney (Lib)
Senator appointed: Ian Campbell (Lib)

088. New South Wales
Date: 28 January 1991
Cause: Resignation of Hon Dr Peter Baume (Lib)
Senator appointed: John Tierney (Lib)

089. New South Wales
Date: 29 August 1991
Cause: Resignation of Paul McLean (AD)
Senator appointed: Karin Sowada (AD)

090. Western Australia
Date: 12 March 1992
Cause: Resignation of Jo Vallentine (Grn)
Senator appointed: Christabel Chamarette (Grn)

091. South Australia
Date: 26 May 1992
Cause: Resignation of John Olsen (Lib)
Senator appointed: Alan Ferguson (Lib)

Thirty-Seventh Parliament 1993-96

092. Victoria
Date: 28 April 1993
Cause: Resignation of Hon John Button (ALP)
Senator appointed: Kim Carr (ALP)

093. Tasmania
Date: 24 August 1993
Cause: Resignation of Hon Michael Tate (ALP
Senator appointed: Kay Denman (ALP)

094. Tasmania
Date: 22 February 1994
Cause: Resignation of Brian Archer (Lib)
Senator appointed: Eric Abetz (Lib)

095. New South Wales
Date: 8 March 1994
Cause: Resignation of Hon Kerry Sibraa (ALP)
Senator appointed: Belinda Neal (ALP)

096. New South Wales
Date: 8 March 1994
Cause: Resignation of Bronwyn Bishop (Lib)
Senator appointed: Dr Bob Woods (Lib)

097. New South Wales
Date: 10 May 1994
Cause: Resignation of Hon Graham Richardson (ALP)
Senator appointed: Michael Forshaw (ALP)

098. Victoria
Date: 3 May 1995
Cause: Death of Olive Zakharov (ALP)
Senator appointed: Jacinta Collins (ALP)

099. New South Wales
Date: 24 May 1995
Cause: Resignation of Stephen Loosley (ALP)
Senator appointed: Tom Wheelwright (ALP)

100. South Australia
Date: 23 November 1995
Cause: Resignation of Dr John Coulter (AD)
Senator appointed: Natasha Stott Despoja (AD)

Thirty-Eighth Parliament 1996-98

101. Tasmania
Date: 8 March 1996
Cause: Resignation of John Devereux (Ind)
Senator appointed: Susan Mackay (ALP)

102. Victoria
Date: 30 April 1996
Cause: Resignation of Hon Gareth Evans (ALP)
Senator appointed: Stephen Conroy (ALP)

103. South Australia
Date: 24 July 1996
Cause: Resignation of Jeannie Ferris (Lib)
Senator appointed: Jeannie Ferris (Lib)

104. Tasmania
Date: 5 September 1996
Cause: Resignation of John Coates (ALP)
Senator appointed: Kerry O'Brien (ALP)

105. New South Wales
Date: 18 September 1996
Cause: Resignation of Michael Baume (Lib)
Senator appointed: Bill Heffernan (Lib)

106. New South Wales
Date: 8 April 1997
Cause: Resignation of Hon Dr Robert Woods (Lib)
Senator appointed: Marise Payne (Lib)

107. Victoria
Date: 13 May 1997
Cause: Resignation of Hon Jim Short (Lib)
Senator appointed: Karen Synon (Lib)

108. Western Australia
Date: 19 May 1997
Cause: Death of John Panizza (Lib)
Senator appointed: Ross Lightfoot (Lib)

109. New South Wales
Date: 17 September 1997
Cause: Resignation of Bruce Childs (ALP)
Senator appointed: George Campbell (ALP)

110. South Australia
Date: 18 September 1997
Cause: Resignation of Dominic Foreman (ALP)
Senator appointed: John Quirke (ALP)

111. Queensland
Date: 30 October 1997
Cause: Resignation of Cheryl Kernot (AD)
Senator appointed: Andrew Bartlett (AD)

112. Northern Territory
Date: 16 June 1998
Cause: Resignation of Hon Bob Collins (ALP)
Senator appointed: Trish Crossin (ALP)

113. New South Wales
Date: 14 October 1998
Cause: Resignation of Belinda Neal (ALP)
Senator appointed: Steve Hutchins (ALP)

Thirty-Ninth Parliament 1998-2001

114. New South Wales
Date: 4 May 2000
Cause: Resignation of David Brownhill (NPA)
Senator appointed: Sandy Macdonald (NPA)

115. Queensland
Date: 16 May 2000
Cause: Resignation of Hon Warwick Parer (Lib)
Senator appointed: George Brandis (Lib)

116. South Australia
Date: 14 September 2000
Cause: Resignation of John Quirke (ALP)
Senator appointed: Geoffrey Buckland (ALP)

117. Queensland
Date: 31 July 2001
Cause: Resignation of John Woodley (AD)
Senator appointed: John Cherry (AD)

Fortieth Parliament: 2001-

118. Tasmania
Date: 4 February 2002
Cause: Resignation of Hon Jocelyn Newman (Lib)
Senator appointed: Richard Colbeck (Lib)

119. Tasmania
Date: 26 February 2002
Cause: Resignation of Hon Brian Gibson (Lib)
Senator appointed: Guy Barnett (Lib)

120. Queensland
Date: 29 October 2002
Cause: Resignation of Dr Hon John Herron (Lib)
Senator appointed: Santo Santoro (Lib)

121. Australian Capital Territory
Date: 18 February 2003
Cause: Resignation of Hon Margaret Reid (Lib)
Senator appointed: Gary Humphries (Lib)