William Armstrong and its variations may refer to:
Politicians William Armstrong (corn merchant) (1778–1857), local politician and corn merchant Bill Armstrong (Australian politician) (1909–1982), member of the Parliament of Australia Billy Armstrong (politician) (born 1943), politician in Northern Ireland William Armstrong (Virginia politician) (1782–1865), U.S. representative from Virginia William Armstrong, Baron Armstrong of Sanderstead (1915–1980), British civil servant William Boardman Armstrong (1883–1954), lawyer and political figure in Nova Scotia, Canada William Drayton Armstrong (1862–1936), member of the Queensland Legislative Assembly William H. Armstrong (Wisconsin politician) (1840/41–1916), Wisconsin legislator William Hepburn Armstrong (1824–1919), U.S. representative from Pennsylvania William James Armstrong (1826–1915), merchant, miller and politician in British Columbia William L. Armstrong (1937–2016), U.S. senator from Colorado William Armstrong (Tennessee politician) (1795–1847), mayor of Nashville, Tennessee William W. Armstrong (journalist) (1833–1905), American journalist and politician from Ohio William W. Armstrong (politician) (1864–1944), American lawyer and politician in New York state William Oscar Armstrong (1847–1932), member of the Massachusetts House of Representatives
Artists William Armstrong (Canadian artist) (1822–1914), Canadian artist Bill Armstrong (photographer), American fine art photographer
Sports Bill Armstrong (announcer) (1932–2000), game show announcer Bill Armstrong (Australian footballer) (born 1936), former Australian rules footballer Bill Armstrong (American football coach) (1873–1938), American college football coach Bill Armstrong (English footballer) (1913–1995), English footballer Bill Armstrong (guard) (1920–1976), American football player Bill Armstrong (defensive back) (born 1955), American football player Bill Armstrong (ice hockey, born 1966), ice hockey player Bill Armstrong (ice hockey, born 1970), ice hockey player, coach, and executive Bill Armstrong (basketball) (born 1977), American college basketball coach William Armstrong (cricketer) (1885–1955), Australian cricketer William Armstrong (footballer) (1892–1968), Australian rules footballer William Armstrong (rugby league), rugby league footballer of the 1920s
Music Bill Armstrong (music producer) (1929–2026), Australian music producer William Armstrong (music critic) (1858–1942), American music critic Billie Joe Armstrong (born 1972), American rock musician with Green Day Willie Armstrong (1804–?), Newcastle upon Tyne-born singer-songwriter
Others William Armstrong (Christie's Will) (1565–1649), Scottish border freebooter, known as "Christie's Will" William Armstrong, 1st Baron Armstrong (1810–1900), British industrialist Duff Armstrong (William Armstrong, c. 1833–1899), 1858 defendant for the murder of James Preston Metzker in Mason County, Illinois William H. Armstrong (author) (1911–1999), author of the children's book Sounder William Nevins Armstrong (1835–1905), attorney general of Hawaii William Armstrong (pilot) (1924–1945), member of the Tuskegee Airmen William T. Armstrong (1929–2005), Canadian Broadcasting Corporation executive William Ward Armstrong, Canadian mathematician and computer scientist William Park Armstrong (1874–1944), theologian and New Testament scholar William Armstrong (theatre director) (1882–1952), British actor, theatre manager and director Billy Armstrong (actor) (1891–1924), British actor Billy Armstrong, alias of comics character Jeremy Karne William Charles Gordon Armstrong (1865–1951), pioneer in the early history of Calgary, Alberta, Canada