Karin Büttner-Janz (née Janz, born 17 February 1952) is a German medical doctor who won world and Olympic gold medals in artistic gymnastics for East Germany.

In a controversial finish, she delivered another gold medal winning performance on the uneven bars at the 1972 Munich Olympics, defeating Olga Korbut on her favourite apparatus.

Most believed she was robbed of the All-Around title, especially as with almost the exact same performances she outscored Tourischeva by a whopping 0.65 of a point (more than a fall) in the event finals 4 routines combined.

[2] Büttner-Janz has an uneven bars element named after her, the Janz Salto, which she first performed in competition at the SV Dynamo Spartakiade in East Berlin, 1971.

From 2014 to 2016, she studied at the Hochschule für Technik und Wirtschaft Berlin and became Master of Business Administration (MBA) in general management.