Franz Josef Johannes Konrad Jung (26 November 1888 – 21 January 1963) was a writer, economist and political activist in Germany.

He grew up in Neisse (now Nysa) and was a childhood friend of the poet Max Herrmann-Neisse.

He studied music, law and economics in Leipzig, Jena, Breslau and Munich.

In 1921, he travelled with Jan Appel to participate in the 3rd World Congress of the Comintern, as a delegate of the Communist Workers Party of Germany (KAPD).

Their clandestine transport involved hijacking the SS Senator Schröder, which was bound for fishing grounds near Iceland, to Murmansk, Russia.