Alexander Dallas may refer to:
Alexander Grant Dallas (1816–1882), British governor of Rupert's Land and Hudson's Bay Company administrator Alexander J. Dallas (statesman) (1759–1817), American Secretary of the Treasury under President James Madison Alexander J. Dallas (United States Navy officer) (1791–1844), U.S. Navy officer (son of the statesman) Alexander Dallas (priest) (1791–1869), Church of England priest founder of the Irish Church Missions to Roman Catholics
See also Alexander Dallas Bache (1806–1867), American physicist