Introduction
Robert Armstrong may refer to:
Robert Archibald Armstrong (1788–1867), Gaelic lexicographer
Robert Armstrong (baseball) (1850–?), American professional baseball player
Robert Armstrong (actor) (1890–1973), film actor
Robert Armstrong (geneticist), plant geneticist
Robert Armstrong, Baron Armstrong of Ilminster (born 1927), British member of the House of Lords and former civil servant
Robert E. Armstrong (1925–2008), mayor of Fort Wayne, Indiana
Robert John Armstrong (1884–1957), fourth Bishop of Sacramento
Robert Armstrong (Irish artist), winner of the 1984 Guinness Peat Aviation Award
Robert Armstrong (comics) (born 1950), American underground comics artist and musician, coined the term "couch potato"
Robert Armstrong (cricketer) (1836–1863), English cricketer
Robert Armstrong (UK politician) (1888/9–1961), member of the Senate of Northern Ireland
Robert Armstrong (Australian politician) (born 1952), member of the Tasmanian Legislative Council
Robert Armstrong (1792–1854), officer in the United States Army
Robert Young Armstrong (1839–1894), British naval electrical engineer
Robert Baynes Armstrong, British Member of Parliament for Lancaster
Robert Patrick Armstrong, lawyer and judge
Fictional
- Robert Armstrong (Home and Away), fictional character in the Australian soap opera Home and Away
- Robert Armstrong (Noble House), a character from James Clavell's novel Noble House