Siniša Hajdaš Doncic (born 29 June 1974) is a Croatian politician and member of the center-left Social Democratic Party.
From 17 June 2009 until 19 April 2012 he served as Prefect of the Krapina-Zagorje County, and since 19 April 2012 to 25 January 2016 Minister of Maritime Affairs Transport and Infrastructure in the Cabinet of Zoran Milanovic.