Alexander Armstrong (born 1970) is a British comedian and presenter.

Alexander Armstrong or Alex Armstrong may also refer to:

  • Sir Alexander Armstrong (Royal Navy officer) (1818–1899), British naval surgeon and explorer of the Arctic
  • Alexander Armstrong (Australian politician) (1916–1985), Australian politician
  • Alexander Armstrong (rugby union) (1897–1973), Australian rugby player
  • Alexander Armstrong (Maryland politician) (1877–1939), Attorney General of Maryland
  • Alex Louis Armstrong, fictional military officer in the Fullmetal Alchemist anime series

See also

  • Alexandra Armstrong, financial advisor
  • Armstrong (surname)