Robert Armstrong may refer to:
Arts and entertainment Robert Armstrong (actor) (1890–1973), film actor Robert Armstrong (cartoonist) (born 1950), American underground comics artist and musician, coined the term "couch potato"
Fictional characters Robert Armstrong (Home and Away), character in the Australian soap opera Robert Armstrong (Noble House), a character from the James Clavell's novel
Government and military Robert Armstrong (Australian politician) (born 1952), member of the Tasmanian Legislative Council Robert Armstrong (Northern Ireland politician) (1888/9–1961), member of the Senate of Northern Ireland Robert Armstrong (military officer) (1792–1854), officer in the United States Army Robert Armstrong, Baron Armstrong of Ilminster (1927–2020), British member of the House of Lords and former civil servant Robert Baynes Armstrong (1785–1869), British Member of Parliament for Lancaster Robert E. Armstrong (1925–2008), American politician from Indiana Robert M. Armstrong (1892–1981), American attorney and politician from Nebraska Robert P. Armstrong (born 1938), Canadian lawyer and judge
Other Robert Armstrong (baseball) (1850–1917), American professional baseball player Robert Armstrong (cricketer) (1836–1863), English cricketer Robert Armstrong (racehorse trainer) (1944–2021), British racehorse trainer Robert Archibald Armstrong (1788–1867), Gaelic lexicographer Robert C. Armstrong, chemical engineer at MIT Robert John Armstrong (1884–1957), fourth Bishop of Sacramento
See also Bob Armstrong (disambiguation) Robert Armstrong-Jones (1857–1943), Welsh physician and psychiatrist Rob Armstrong (born 1996), Canadian ice sledge hockey player