Otto Müller
Otto Müller or Mueller may refer to:
- Otto Mueller, German painter of the Die Brücke movement
- Otto Müller (painter), German painter from Halle, Saxony-Anhalt
- Otto Mueller (politician), American politician in Wisconsin
- Otto Müller (novelist), German novelist
- Otto Müller (water polo), Austrian Olympic water polo player
- Otto Müller (wrestler), Swiss freestyle wrestler
- Otto Friedrich Müller, Danish naturalist
- Otto Müller (priest), German priest, member of German Resistance in Nazi Germany
- Otto Thott Fritzner Müller, Norwegian politician
- Otto Müller or Walther Otto Müller, German botanist specializing in cryptogamenae