Karl Müller

Karl Müller may refer to:


 * Karl Müller (astronomer) (1866–1942), Austrian astronomer
 * Karl Müller (botanist) (1817-1870), German botanist and mycologist
 * Karl Müller (bryologist) (1818–1899), German bryologist
 * Karl Müller (inventor) (born 1952), Swiss inventor and engineer
 * Karl Müller (rower) (1912–?), Swiss Olympic rower
 * Karl H. Müller (born 1953), Austrian social scientist
 * Karl-Heinz Müller (born 1948), Austrian Olympic fencer
 * Karl Otfried Müller (1797–1840), German classical scholar and admirer of Dorians and Spartans
 * Karl Wilhelm Ludwig Müller (1813–1894), German classical scholar and editor of Fragmenta Historicorum Graecorum
 * K. Alex Müller (Karl Alexander Müller, 1927–2023), Swiss physicist, 1987 Nobel Prize
 * Karl Müller (politician, born 1884) (1884–1964), German politician