Alexander Macmillan may refer to:Alexander MacMillan (publisher) (1818–1896), co-founder of Macmillan Publishers Alexander Macmillan, 2nd Earl of Stockton, 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, American politician from North Carolina Alexander McMillan, American politician from North Carolina Alexander McMillan (1825–1901), American politician in Wisconsin Alexander Macmillan, Canadian engineer