Karl Müller
Karl Müller may refer to:
- Karl Müller (astronomer), Austrian astronomer
- Karl Müller (botanist), German botanist and mycologist
- Karl Müller (botanist, born 1893), German botanist
- Karl Müller (bryologist), German bryologist
- Karl Müller (bryologist, born 1881), German bryologist
- Karl Müller (inventor), Swiss inventor and engineer
- Karl Müller (rower), Swiss Olympic rower
- Karl H. Müller, Austrian social scientist
- Karl Otfried Müller, German classical scholar and admirer of Dorians and Spartans
- Karl Wilhelm Ludwig Müller, German classical scholar and editor of Fragmenta Historicorum Graecorum
- K. Alex Müller, Swiss physicist, 1987 Nobel Prize
- Karl Müller (politician, born 1884), German politician