Alexander or Alex Müller may refer to:
K. Alex Müller (1927–2023), Swiss physicist and Nobel laureate
Alex Müller (racing driver) (born 1979), German racing driver
Alexander Müller (skeleton racer), Austrian skeleton racer
Alexander Müller (composer) (1808–1863), German pianist, teacher, conductor and composer
Alexander Müller (politician) (born 1969), German politician
Alexander Müller (chemist) (1828–1906), German agricultural chemist
