Editing Pauline Hanson's One Nation (section)

===New South Wales===
{| class="wikitable" style="text-align:center"
|-
! width=2%|No.
!Image
! style="width:20%;" |Leader
! colspan="2"|Term of office
! Office (or previous office)
! Notes
|-
! style="background:{{Australian politics/party colours|One Nation}}; color:black;" |1
| [[File:3x4.svg|70px]]
| style="text-align:center;" |[[David Oldfield (politician)|David Oldfield]]
| {{Small|27 March 1999}}
| {{Small|8 October 2000}}
| [[Senate|Senator]] for [[New South Wales]]<br />{{small|([[Australian federal election, 1998|Candidate]])}} [[New South Wales Legislative Council|MLC]] <br />{{small |(1997–2007)}}<br />[[Manly, New South Wales|City of Manly]] [[Alderman]]<br />{{small|(1991–1999)}}
| Sacked as leader after party intervention<br/>Later leader of breakaway party, [[One Nation NSW]] {{small |(2000–2004)}}
|-
! style="background:{{Australian politics/party colours|One Nation}}; color:black;" |2
| [[File:3x4.svg|70px]]
| style="text-align:center;" |[[One Nation NSW|Judith Newson]]
| {{Small|8 October 2000}}
| {{Small|30 March 2010}}
|  
| 
|-
! style="background:{{Australian politics/party colours|One Nation}}; color:black;" |3
|[[File:Brian_Burston.jpg|83x83px]]
| style="text-align:center;" |[[Brian Burston]]
| {{Small|31 March 2010}}
| {{Small|17 June 2018}}
| [[Australian Senate|Senator]] for [[New South Wales]]<br />{{small |(2016–2019)}} <br /> [[Cessnock, New South Wales|City of Cessnock]] Deputy Mayor<br />{{small |(1987–1999)}}
| Resigned as leader after party intervention
|-
! style="background:{{Australian politics/party colours|One Nation}}; color:black;" |4
|[[File:Mark_Latham.png|83x83px]]
| style="text-align:center;" |[[Mark Latham]]
| {{Small|7 November 2018}}
| {{Small|14 August 2023}}
|  [[Australian House of Representatives|MP]] for [[Division of Werriwa|Werriwa]] <br />{{small |(1994–2005)}} <br /> [[New South Wales Legislative Council|MLC]] <br />{{small |(2019–present)}} <br /> [[Shadow Ministry of Mark Latham| Labor Leader]] <br />{{small |(2003–2005)}}
| Sacked as leader after party intervention
|-
! style="background:{{Australian politics/party colours|One Nation}}; color:black;" |5
|[[File:Tania Mihailuk MP.jpg|87x87px]]
| style="text-align:center;" |[[Tania Mihailuk]]
| {{Small|10 December 2023}}
| {{Small|20 December 2024}}
|  [[City of Bankstown|Mayor of Bankstown]] <br />{{small |(2006–2011)}} <br /> [[New South Wales Legislative Council|MLC]] <br />{{small |(2023–present)}} <br /> [[New South Wales Legislative Assembly| MLA]] for [[Electoral district of Bankstown|Bankstown]] <br />{{small |(2011-2023)}}
| Resigned as leader over administrative and funding issues
|}

Oldfield was elected to New South Wales parliament in 1999, but left One Nation in 2000, he then formed a splinter party called One Nation NSW, which he led until 2004 when he resigned. Oldfield remained an independent in the legislative council until 2007, when he did not seek re-election.