Kezia Alexandra Ross Dugdale 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.

The office of Leader of the Scottish Labour Party was established when the Scottish Parliament was formed in 1999 and prior to its inaugural election. Until the Murphy and Boyack review in 2011, the office was Leader of the Labour Party in the Scottish Parliament and restricted to members of the Scottish Parliament. Since the review, the office has been opened up to all elected Scottish Labour politicians, including those involved in the Parliament of the United Kingdom and local government.