Donald Thomas Harwin (born 5 July 1964) is an Australian politician. He was the New South Wales Special Minister of State and the Minister for the Public Service and Employee Relations, Aboriginal Affairs, and the Arts in the second Berejiklian ministry since April 2019; and the Vice-President of the Executive Council, and the Leader of the Government in the Legislative Council since January 2017 in the Berejiklian government. He briefly resigned from his roles with effect from 15 April 2020, however was reinstated on 3 July 2020.