This is a list of members of the Australian Senate from 1 July 1978 to 30 June 1981.[1] Half of the state senators were elected at the December 1975 election and had terms due to finish on 30 June 1981; the other half of the state senators were elected at the December 1977 election and had terms due to finish on 30 June 1984. The territory senators were elected at the December 1977 election and their terms ended at the dissolution of the House of Representatives, which was October 1980.
^ abQueensland NCP Senator Glen Sheil resigned in early 1981. Florence Bjelke-Petersen was appointed as his replacement on 12 March for a term ending 30 June 1981.
^ abNew South Wales Liberal Senator Bob Cotton resigned on 13 July 1978. Chris Puplick was appointed as his replacement on 26 July for a term ending 30 June 1981.
^ abWestern Australian Liberal Senator Allan Rocher resigned in early 1981 to contest the 1981 Curtin by-election. John Martyr was appointed as his replacement on 11 March for a term ending 30 June 1984.
^ abNew South Wales Labor Senator Jim McClelland resigned on 21 July 1978. Kerry Sibraa was appointed as his replacement on 9 August for a term ending 30 June 1981.
^ abVictorian National Party Senator James Webster resigned on 21 January 1980. Laurence Neal was appointed as his replacement on 11 March for a term ending 30 June 1981.