Walter Müller or Mueller may refer to: Walter Mueller (1894–1971), American baseball player Walter H. Mueller (?–2011), American politician Walter Müller (actor) (1911–1969), Austrian film actor Walter Müller (biathlete) (1940–1966), Austrian Olympic biathlete Walter Müller (Panzerjäger) (1914–2003), German army officer Walter Müller (footballer, born 1970) (born 1970), Swiss footballer Walter Müller (footballer, born 1920) (1920–2010), Swiss footballer Walter Müller (footballer, born 1910) (1910–?), Swiss footballer Walter Müller (German gymnast) (1930–2021), German Olympic gymnast Walter Müller (Swiss gymnast) (born 1940), Swiss Olympic gymnast Walter Müller (handballer) (born 1957), Swiss handballer Walter Andreas Müller (born 1945), Swiss stage and film actor Walter W. Müller (born 1933), German specialist in ancient South Arabia and Semitic epigraphy Walter Müller (writer), Austrian writer, winner of an award at the 1979 Festival of German-Language Literature