Otto Siffling (3 August 1912 – 20 October 1939) was a German footballer who played as a forward for Waldhof Mannheim and the Germany national team.

An opinionated and exceptionally gifted player, Siffling was a virtuoso on the pitch who impressed with his ingenuity and imagination when on the ball.

Being not keen on overly physical play, he was not a traditional center forward, preferring to create more than to score.

[2] Taciturn in nature, he did not like to be in the spotlight and ovations at times made him feel uncomfortable.

In his 1978 book Fussball, Helmut Schön characterised Siffling as follows: "As a center forward he was not a tank but a playing center forward who still was enormously dangerous in front of the goal; in the famous game in Breslau he scored five goals.