Alexander Abercromby may refer to:

• Sir Alexander Abercromby, 1st Baronet (c. 1603–1684), Scottish politician, commissioner for Banffshire 1640–1641, 1643, 1646–1648 and 1661–1663
• Alexander Abercromby (Scottish politician, born 1678) (1678–1728), Scottish politician, MP for Banffshire 1706–1727
• Alexander Abercromby, Lord Abercromby (1745–1795), Scottish advocate, judge and essayist
• Alexander Abercromby (British Army officer) (1784–1853), Scottish army officer and politician, MP for Clackmannanshire

• Abercromby (surname)