Markus Ertelt (born December 11, 1978, in Stuttgart) is a German actor and extreme obstacle course runner.

Ertelt trained as an actor at the Academy of Performing Arts in Ulm from 2001 to 2005. He played supporting roles in television productions such as *Der Bergdoktor*, *Unter uns*, *Unser Charly*, *SOKO 5113*, and *Mein Leben und ich*. He also made occasional appearances in commercials.