Gustav Sobottka Jr. (10 April 1915 – 22 September 1940) was a German communist and the son of Communist Party functionary and trade unionist Gustav Sobottka. He spent several months in Nazi concentration camps, then left Germany, eventually living in exile in the Soviet Union. He was arrested by the Soviet secret police at the age of 23 and accused of being part of the so-called Hitler Youth Conspiracy. Sobottka died in a Soviet prison.