The Leader of the Opposition of the Australian Capital Territory is an official role usually occupied by the leader of the second largest party or coalition in the Australian Capital Territory Legislative Assembly

Australian Capital Territory Legislative Assembly

The Australian Capital Territory Legislative Assembly is the unicameral legislature of the Australian Capital Territory...

. The title is conferred under Standing Order 5A of the ACT Legislative Assembly, that the Leader of the Opposition shall be the leader of the largest non-Government party, with the consent of that member. In the event of an equal number of members of the second largest party, the Assembly shall vote and elect a Leader of the Opposition.

List of Opposition Leaders of the Australian Capital Territory

#	Opposition Leader	Party	Dates in Opposition	Timespan	Notes
1	Trevor Kaine Trevor Kaine Trevor Thomas Kaine , an Australian politician, was Chief Minister of the Australian Capital Territory from 1989 to 1991, and was elected a multi-member single electorate first unicameral Australian Capital Territory Legislative Assembly, from 1989 to 2001, initially as a member of the Liberal...	Liberal Liberal Party of Australia The Liberal Party of Australia is an Australian political party.Founded a year after the 1943 federal election to replace the United Australia Party, the centre-right Liberal Party typically competes with the centre-left Australian Labor Party for political office...	11 May 1989 – 5 December 1989
2	Rosemary Follett Rosemary Follett Rosemary Follett AO , Australian politician, was the first Chief Minister of the Australian Capital Territory. She was the first woman to become head of government in an Australian state or territory....	Labor Australian Labor Party The Australian Labor Party is an Australian political party. It has been the governing party of the Commonwealth of Australia since the 2007 federal election. Julia Gillard is the party's federal parliamentary leader and Prime Minister of Australia...	5 December 1989 – 6 June 1991
(1)	Trevor Kaine Trevor Kaine Trevor Thomas Kaine , an Australian politician, was Chief Minister of the Australian Capital Territory from 1989 to 1991, and was elected a multi-member single electorate first unicameral Australian Capital Territory Legislative Assembly, from 1989 to 2001, initially as a member of the Liberal...	Liberal Liberal Party of Australia The Liberal Party of Australia is an Australian political party.Founded a year after the 1943 federal election to replace the United Australia Party, the centre-right Liberal Party typically competes with the centre-left Australian Labor Party for political office...	6 June 1991 – 21 June 1991
3	Craig Duby Craig Duby Craig Duby was a politician in the .Australian Capital Territory. The decision of the Australian government to replace direct administration of the Territory with self-government was widely criticised...	Independents Group Independents Group The Independents Group were a short-lived Australian political party operating in the Australian Capital Territory. They briefly served as part of the Alliance government, alongside the Liberal Party of Australia and Residents Rally....	21 June 1991
4	Gary Humphries Gary Humphries Gary John Joseph Humphries has been a member of the Australian Senate representing the Australian Capital Territory for the Liberal Party of Australia since 2003...	Liberal Liberal Party of Australia The Liberal Party of Australia is an Australian political party.Founded a year after the 1943 federal election to replace the United Australia Party, the centre-right Liberal Party typically competes with the centre-left Australian Labor Party for political office...	21 June 1991 – 22 July 1991
(1)	Trevor Kaine Trevor Kaine Trevor Thomas Kaine , an Australian politician, was Chief Minister of the Australian Capital Territory from 1989 to 1991, and was elected a multi-member single electorate first unicameral Australian Capital Territory Legislative Assembly, from 1989 to 2001, initially as a member of the Liberal...	Liberal Liberal Party of Australia The Liberal Party of Australia is an Australian political party.Founded a year after the 1943 federal election to replace the United Australia Party, the centre-right Liberal Party typically competes with the centre-left Australian Labor Party for political office...	22 July 1991 – 21 April 1993
5	Kate Carnell Kate Carnell Anne Katherine Carnell AO was the third Chief Minister of the Australian Capital Territory, serving from 1995 to 2000. She is currently Chief Executive Officer of the Australian Food and Grocery Council.-Pharmacy career:...	Liberal Liberal Party of Australia The Liberal Party of Australia is an Australian political party.Founded a year after the 1943 federal election to replace the United Australia Party, the centre-right Liberal Party typically competes with the centre-left Australian Labor Party for political office...	21 April 1993 – 9 March 1995
(2)	Rosemary Follett Rosemary Follett Rosemary Follett AO , Australian politician, was the first Chief Minister of the Australian Capital Territory. She was the first woman to become head of government in an Australian state or territory....	Labor Australian Labor Party The Australian Labor Party is an Australian political party. It has been the governing party of the Commonwealth of Australia since the 2007 federal election. Julia Gillard is the party's federal parliamentary leader and Prime Minister of Australia...	9 March 1995 – 5 March 1996
6	Andrew Whitecross Andrew Whitecross Andrew Whitecross is an Australian politician and was a member of the Australian Capital Territory Legislative Assembly, elected to the multi-member electorate of Brindabella for the Australian Labor Party. Whitecross was elected the third ACT Legislative Assembly at the 1995 general election as a...	Labor Australian Labor Party The Australian Labor Party is an Australian political party. It has been the governing party of the Commonwealth of Australia since the 2007 federal election. Julia Gillard is the party's federal parliamentary leader and Prime Minister of Australia...	5 March 1996 – 19 August 1997
7	Wayne Berry Wayne Berry Wayne Bruce Berry , former Australian politician, was a member of the unicameral Australian Capital Territory Legislative Assembly from 1989 to 2008, representing the electorate of Ginninderra for the Australian Labor Party...	Labor Australian Labor Party The Australian Labor Party is an Australian political party. It has been the governing party of the Commonwealth of Australia since the 2007 federal election. Julia Gillard is the party's federal parliamentary leader and Prime Minister of Australia...	19 August 1997 – 20 February 1998
8	Jon Stanhope Jon Stanhope Jonathan Ronald Stanhope is a former Australian politician who was Labor Chief Minister of the Australian Capital Territory from 2001 to 2011. Stanhope represented the Ginninderra electorate in the ACT Legislative Assembly from 1998 until 2011. He resigned as Chief Minister on 12 May 2011 and as...	Labor Australian Labor Party The Australian Labor Party is an Australian political party. It has been the governing party of the Commonwealth of Australia since the 2007 federal election. Julia Gillard is the party's federal parliamentary leader and Prime Minister of Australia...	19 March 1998 – 19 October 2001
(4)	Gary Humphries Gary Humphries Gary John Joseph Humphries has been a member of the Australian Senate representing the Australian Capital Territory for the Liberal Party of Australia since 2003...	Liberal Liberal Party of Australia The Liberal Party of Australia is an Australian political party.Founded a year after the 1943 federal election to replace the United Australia Party, the centre-right Liberal Party typically competes with the centre-left Australian Labor Party for political office...	12 November 2001 – 25 November 2002
9	Brendan Smyth Brendan Smyth (politician) Brendan Michael Smyth is a Liberal Party of Australia politician. From 2002 to 2006 he was the Leader of the Opposition in the Australian Capital Territory. He retains his shadow previous portfolios of Health, Ageing, Business and Tourism at present. He represents the electorate of...	Liberal Liberal Party of Australia The Liberal Party of Australia is an Australian political party.Founded a year after the 1943 federal election to replace the United Australia Party, the centre-right Liberal Party typically competes with the centre-left Australian Labor Party for political office...	25 November 2002 – 16 May 2006
10	Bill Stefaniak Bill Stefaniak William George "Bill" Stefaniak is an Australian Liberal Party politician. He was the Leader of the Opposition in the Australian Capital Territory after succeeding in a leadership challenge against former leader Brendan Smyth on 16 May 2006. He is a former Major in the Australian Army Reserve and...	Liberal Liberal Party of Australia The Liberal Party of Australia is an Australian political party.Founded a year after the 1943 federal election to replace the United Australia Party, the centre-right Liberal Party typically competes with the centre-left Australian Labor Party for political office...	16 May 2006 – 13 December 2007
11	Zed Seselja Zed Seselja Zed Seselja is a Liberal Party Australian politician. He has been a member of the Australian Capital Territory Legislative Assembly since 2004. He has been the territory's 12th Opposition Leader since December 2007, when he was appointed to the position following the resignation of Bill Stefaniak...	Liberal Liberal Party of Australia The Liberal Party of Australia is an Australian political party.Founded a year after the 1943 federal election to replace the United Australia Party, the centre-right Liberal Party typically competes with the centre-left Australian Labor Party for political office...	13 December 2007 – Incumbent