Alexander Hay may refer to:
Alexander Hay (died 1594), Scottish politician Alexander Hay, Lord Fosterseat (c. 1560–1640), Scottish judge Alexander Hay (mayor) (1806–1882), mayor of Pittsburgh, 1842–1845 Alexander Hay (South Australian politician) (1820–1898), member of the South Australian Parliament Alexander Hay (songwriter) (1826–after 1891), Newcastle–born cabinet maker, songwriter and poet Alexander Hay (Australian politician) (1865–1941), New Zealand-born member of the Australian House of Representatives Alexander Leith Hay (1758–1838), British army officer Alex Hay (1933–2011), Scottish golfer