Sigmund Jähn
Birthday: 2/13/1937
Gender: Male
Place Of Birth: Morgenröthe-Rautenkranz, Saxony, German Reich

Sigmund Werner Paul Jähn (13 February 1937 – 21 September 2019) was a German cosmonaut and pilot who in 1978 became the first German to fly into space as part of the Soviet Union's Interkosmos programme.