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)