Steffen Zesner (born 28 September 1967) is a former freestyle swimmer from Germany, who won a total number of four medals as a relay member at the Summer Olympics. His best result was a silver medal, on the 4×200 metres freestyle, alongside Uwe Dassler, Thomas Flemming, and Sven Lodziewski in Seoul, South Korea. He swam for SC Dynamo Berlin and its successor SC Berlin.