Alexander Nicholson may refer to:
Alexander Malcolm Nicholson (1900–1991), Canadian clergyman, farmer and politician Alexander John Nicholson (1895–1969), Irish-Australian entomologist Alexander M. Nicolson (1880/1881–1950), sometimes spelled Nicholson in later sources, American inventor Alexander Nicholson (police officer) (1863–1928), Australian police officer
See also Alex Nicholson (disambiguation)