Stefan Doernberg (21 June 1924 – 3 May 2010) was a writer, secondary school teacher and Researcher of Contemporary History as well as the final director of International Relations Institute for the Academy of the State and Jurisprudence (ASR in German) for the German Democratic Republic (East Germany). He was the East German ambassador to Finland from 1981 to 1987.
Doernberg was born the son of an official of the KPD. In 1935, he and his parents emigrated to the Soviet Union where he attended the Karl Liebknecht School. In 1939, he joined the KJVD and received his Abitur in Moscow.
On the day of Operation Barbarossa, he joined the Red Army. He was temporarily interned in a work camp in the Urals because of his German origins but he returned from his stay there to the front after schooling in the Comintern. As a Lieutenant in the 8th Guards Army he participated in the battles in the Ukraine, Poland, and Berlin.