This is a list of members of the Australian Senate from 1999 to 2002. Half of the state senators had been elected at the March 1996 election and had terms due to finish on 30 June 2002; the other half of the state senators were elected at the October 1998 election and had terms due to finish on 30 June 2005. The territory senators were elected at the October 1998 election and their terms ended at the next federal election, which was November 2001.
Senate composition at 1 July 1999
Government (35) – (4 seat minority)
- Shayne Murphy resigned from the ALP on 2 October 2001 and served out the rest of his term as an independent.
- Liberal Senator Brian Gibson resigned in 2002. Guy Barnett was appointed as his replacement.
- Liberal Senator Warwick Parer resigned in 2000. George Brandis was appointed as his replacement on 16 May.
- National Senator David Brownhill resigned in 2000. Former Senator Sandy Macdonald was appointed as his replacement on 4 May.
- ALP Senator John Quirke resigned in 2000. Geoff Buckland was appointed as his replacement on 14 September.
- Democrat Senator John Woodley resigned in 2001. John Cherry was appointed as his replacement on 31 July.
- Liberal Senator Jocelyn Newman resigned in 2002. Richard Colbeck was appointed as her replacement.
- The term of a territory senator ends at the dissolution of the House of Representatives, which was November 2001.
- Father of the Senate
- Heather Hill was initially elected as a One Nation Senator in Queensland, but she was declared ineligible as the citizen of a foreign power before she was able to take her seat. One Nation member Len Harris was subsequently elected on a recount.
- ALP Senator Shayne Murphy resigned from the party on 2 October 2001 and served out the rest of his term as an independent.
- The Country Liberal Party disendorsed Grant Tambling before the 2001 election, and Nigel Scullion was subsequently elected.