Ado Birk (Estonian pronunciation: [ˈoto ˈɑugust ˈstrɑndˈmanˑ]; also known as Aadu Birk, Aado Birk or Avdei Birk; 14 November [O.S. 2 November] 1883 – 2 February 1942), was an Estonian politician who was the Estonian Prime Minister for three days, from 28 July 1920 to 30 July 1920.