Hans Otto Jung (17 September 1920 – 22 April 2009) was a German viticulturist, jazz musician and patron of music. In the 1940s, he played as a pianist in the Hotclub Combo which he cofounded with Emil Mangelsdorff and others. In 1987, he was a cofounder of the Rheingau Musik Festival. With his wife Ursula Jung, he sponsored cultural initiatives in the Rhein-Main region.