Nick Houston Gary Cowton David Kim (CDP) There were 105 candidates for the Senate in New South Wales.
One Nation was defending one seat, although sitting senator Brian Burston had defected to the United Australia Party.
Debby Lo-Dean Gary Sharpe Paul Larcombe Jane Hasler John Woodward Nicholas McArthur-Williams Hassan Ghulam Wayne Wharton Amanda Murphy Paul Stevenson (MHP) There were 42 Senate candidates for the Senate in South Australia.
The Centre Alliance, formerly the Nick Xenophon Team, was defending one seat, although sitting senator Tim Storer, who retired, had sat as an independent.
Senators Cory Bernardi (Conservatives, elected as Liberal), Simon Birmingham (Liberal), Don Farrell (Labor), Stirling Griff (Centre), Rex Patrick (Centre) and Penny Wong (Labor) were not up for re-election.
Michael Lesiw Brett O'Donnell Henry Cox There were 44 Senate candidates for Tasmania.
The Jacqui Lambie Network was defending one seat, although sitting senator Steve Martin had defected to the National Party.
Greg Beck (ABF) Steve Mav Francis Flannery Karen Street (LAL) There were 82 candidates for the Senate in Victoria.
Senators Kim Carr (Labor), Richard Di Natale (Greens), Mitch Fifield (Liberal), Kimberley Kitching (Labor), Bridget McKenzie (National) and Scott Ryan (Liberal) were not up for re-election.
Kenneth Betts Max Dicks Murray McInnis Karl Morris There were 67 Senate candidates for Western Australia.
As the disendorsements and resignations took place after the close of nominations, their names and party affiliation will still appear on ballot papers.
In late 2019, media outlets around the world have reported on alleged efforts by the People's Republic of China to infiltrate the Parliament of Australia by recruiting a spy to run in a constituency during the 2019 Australian federal election.