Steffen Deibler (born 10 July 1987) is a German former competitive swimmer from Biberach an der Riß.

He graduated in 2007 at Pestalozzi-Gymnasium Biberach and started to study environment engineering in October 2008.

As a teenager, Deibler trained at the TG Biberach under coach Gerold Seifert.

At the 2008 German swimming championships, he won 50 m and 100 m freestyle and qualified for the 2008 Summer Olympics.

[1] At the 2016 Summer Olympics in Rio de Janeiro, he competed in the 100 m butterfly where he finished 18th in the heats and did not qualify for the semifinals.