One Nation New South Wales

1990s

Capitalising off the success of the Queensland division of the party at the 1998 Queensland state election, One Nation New South Wales contested the 1999 New South Wales state election under the leadership of David Oldfield, Oldfield had previously served as the parties lead senate candidate at the 1998 Australian federal election in the state of New South Wales, but fell short of being elected. He was elected to the New South Wales Legislative Council that year as the parties sole MP, with his deputy Brian Burston just missing out on securing a second seat for the party.^{[citation needed]}

2000s

In 2000, Oldfield was expelled from One Nation by Pauline Hanson, his expulsion led to the division of the NSW branch of the party into two camps, those who supported Oldfield, and those who supported Hanson and the federal party. Oldfield took advantage of the electoral laws of New South Wales, and registered a splinter party called One Nation NSW, which claimed to be the legitimate One Nation body in the state, much to the annoyance of Hanson.^{[citation needed]}

2017–present

Since the demise of Oldfield's One Nation NSW, as well as the party's collapse at the federal level, the party had little presence in New South Wales and received minimal attention, however the resurgence of One Nation at the 2016 Australian federal election provided an opportunity for the parties return to state politics, in 2017, NSW One Nation published its party constitution.^[2]

In 2018, former federal Labor leader Mark Latham joined One Nation as the party's leader in New South Wales.^[3]

At the 2019 state election, One Nation won two seats on the Legislative Council, which were won by Mark Latham and Rod Roberts.^{[citation needed]}

For the 2023 state election, the party announced it would contest in more electorates.^[4] Outgoing MP for Bankstown Tania Mihailuk joined One Nation and contested the Legislative Council.^[5] Mark Latham also successfully contested the Legislative Council, having resigned from his seat creating a casual vacancy to run for another term.^[6] The vacancy was filled by former Legislative Assembly member Tania Mihailuk.^[7][8]

MLC Rod Roberts was elected as Deputy President of the Legislative Council during the 58th Parliament of New South Wales, he had previously served as Assistant President.^[9]

Latham was removed as leader by the national party executive on 14 August 2023.^[10] Roberts supported Latham against Hanson in the ensuing dispute, claiming that Hanson's decision to appoint perennial candidate Steve Mav as NSW party treasurer was misguided.^[11] On 22 August 2023, Mark Latham left the party to become an independent, he was joined by his colleague Rod Roberts.^[12]

The departure of Latham and Roberts left Mihailuk as the sole One Nation MLC, and she would later become state leader on 10 December 2023.^[13]

Mihailuk announced her resignation both as leader of One Nation and from the party itself on 20 December 2024, leaving One Nation with no representation in the New South Wales parliament.^[14]

On 8 December 2025, former Deputy Prime Minister Barnaby Joyce announced he would be joining One Nation, with the expectation he would also head the One Nation Senate ticket in NSW in 2028.^[15]

In August 2026, One Nation announced that their state leader going into the 2027 state election would be former state investment commissioner Mike Newman, Newman announced his candidacy for the seat of Cessnock.^[16]

Leaders

This section is an excerpt from One Nation § NSW leaders.[edit]

More information No., Image ...

No.	Image	Leader	Electorate	Term	Notes
1		David Oldfield	MLC (1997–2007) Manly Council Alderman (1991–1999)	27 March 1999 – 8 October 2000	Sacked as leader after party intervention Later leader of breakaway party, One Nation NSW (2000–2004)
2		Brian Burston	Senator for New South Wales (2016–2019) City of Cessnock Deputy Mayor (1987–1999)	31 March 2010 – 17 June 2018	Resigned as leader after party intervention
3		Mark Latham	MP for Werriwa (1994–2005) MLC (2019–present) Labor Opposition Leader (2003–2005)	7 November 2018 – 14 August 2023	Sacked as leader after party intervention
4		Tania Mihailuk	Mayor of Bankstown (2006–2011) MLC (2023–present) MP for Bankstown (2011–2023)	10 December 2023 – 20 December 2024	Resigned as leader over administrative and funding issues
5		Mike Newman	–	28 August 2026 – Present

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Current MPs

• 
  Senator Sean Bell (NSW), 2025–present
• 
  Barnaby Joyce MP (New England), 2025–present

Former MPs