Jacek Robert Sasin (born 6 November 1969 in Warsaw) is a Polish politician and former local government official. In 2007 he assumed the role of voivode of the Masovian Voivodeship. His career included stints as the deputy head of the Chancellery of the President and as secretary of state in the Chancellery of the Prime Minister. Sasin is the serving deputy prime minister (from June 2019) and the minister for state assets (from November 2019). In the Sejm, he was the chairman of the Public Finance Committee. Sasin has a degree in history from Warsaw University, completing a thesis under , and later studied at Kozminski University.