Alexander Macmillan

Alexander Macmillan may refer to:


 * Alexander MacMillan (publisher) (1818–1896), co-founder of Macmillan Publishers
 * Alexander Macmillan, 2nd Earl of Stockton (born 1943), descendant and former chairman of Macmillan Publishers
 * Alexander Hugh Macmillan (1877–1966), member of the Watch Tower Bible & Tract Society Board of Directors in 1918
 * Alexander Stirling MacMillan (1871–1955), Canadian politician in Nova Scotia
 * Alex McMillan (born 1932), American politician from North Carolina
 * Alexander McMillan (North Carolina politician) (died 1817), American politician from North Carolina
 * Alexander McMillan (Wisconsin pioneer) (1825–1901), American politician in Wisconsin
 * Alexander Macmillan (born 1927), Canadian engineer