Stefan Müller or Mueller may refer to:
Stefan Müller (athlete) (born 1979), Swiss javelin thrower Stefan Müller (mathematician) (born 1962), German mathematician Stefan Müller (footballer, born 1974), German footballer Stefan Müller (footballer, born 1988), German footballer Stefan Mueller (soccer, born 1995), American footballer Stefan Mueller, a fictional Nazi in the Columbo Season 5 episode "Now You See Him..." Stefan Müller (linguist), German linguist Stefan Müller (politician) (born 1975)
See also Stephen Mueller (1947–2011), American painter