Kezia Alexandra Ross Dugdale (born 28 August 1981) is a Scottish former politician who served as Leader of the Scottish Labour Party from 2015 to 2017. A former member of the Scottish Labour Party and Co-operative Party, she was a Member of the Scottish Parliament (MSP) for the Lothian region from 2011 to 2019.

Born in Aberdeen and raised in Dundee, Dugdale studied law at the University of Aberdeen and Policy Studies at the University of Edinburgh, where she was a campaigns and welfare adviser. After leaving university, she worked as an election agent, political researcher and parliamentary officer. She was elected at the 2011 Scottish Parliament election on the Lothian regional list and became Deputy Leader of the Scottish Labour Party in 2014.

Dugdale was elected Leader of the Scottish Labour Party in the 2015 Scottish Labour leadership election. She led the party into the 2016 Scottish Parliament election; where it finished third behind the Scottish National Party (SNP) and Scottish Conservatives; Dugdale failed to be elected to the Edinburgh Eastern constituency, once again being elected on the Lothian regional list. During the 2017 general election, the party held their previously sole seat and gained a further six seats from the SNP. She resigned as leader in August 2017 to "pass on the baton" to a successor who would lead the party into the 2021 Scottish Parliament election.

After leaving frontbench politics, Dugdale worked as a columnist and appeared as a contestant on the seventeenth series of ITV reality show I'm a Celebrity...Get Me Out of Here! in November 2017. She later resigned her seat and Scottish Labour membership in July 2019 and accepted the role of director of the John Smith Centre for Public Service at the University of Glasgow. In 2024 Dugdale became Associate Director of the Centre for Public Policy at the University of Glasgow.

Dugdale was born in Aberdeen on 28 August 1981. She attended secondary school at Harris Academy in Dundee, where she was Head Girl. She studied law at the University of Aberdeen from 1999 until 2003, and completed a master's degree in policy studies from 2004 until 2006 at the University of Edinburgh. Whilst attending university, she worked as campaigns and welfare adviser for Edinburgh University Students' Association and as public affairs officer at the National Union of Students Scotland.

Dugdale sat on Scottish Labour's Policy Forum from 2006 until 2008, as well as serving as an election agent to both Sarah Boyack MSP and Sheila Gilmore MP. She had also volunteered as a researcher in the parliamentary office of Pauline McNeill MSP. She worked from 2007 to 2011 for the Labour Lothian regional MSP George Foulkes, by then also a Labour life peer, as his parliamentary office manager and political adviser.

In the 2011 Scottish Parliament election, Dugdale was elected to the Scottish Parliament as Scottish Labour's second candidate on their list for the Lothian region. She served as a Scottish Labour and Co-operative Party member and sat on the Local Government and Regeneration and Subordinate Legislation Committees. Dugdale was appointed as Scottish Labour's Spokesperson for Education and Lifelong Learning on 29 June 2013.

Dugdale won the 2014 Scottish Labour deputy leadership election, succeeding Anas Sarwar, and defeating Katy Clark. As Scottish Labour leader Jim Murphy did not have a seat in the Scottish Parliament, she stood in for him at First Minister's Questions. On 13 June 2015, she resigned from the deputy leadership in order to contest the 2015 Scottish Labour leadership election. She was succeeded by Alex Rowley after the leadership election.