Jürgen Kuczynski (German pronunciation: ['j??gn? ku't??nski?]; 17 September 1904, Elberfeld – 6 August 1997, Berlin) was a German economist and communist.
He worked with the US Army during the Second World War while in exile in England, and at the same time served as a spy for the Soviet Union, passing extensive information to them.
After the war, he initially returned to Germany on assignment with the US Army.
He settled in East Germany, part of the Soviet Union zone of influence, and became one of its leading intellectuals.