William Armstrong

William Armstrong may refer to:

• Kinmont Willie Armstrong (fl. 16th century), Scottish border reiver, known as "Kinmont Willie"
• William “Willie” Armstrong (1804-????), 19th century Newcastle upon Tyne born singer-songwriter
• William Armstrong (Christie's Will) (1602?–1658?), Scottish border freebooter, known as "Christie's Will"
• William Armstrong (artist) (1822–1914), Canadian artist
• William Armstrong (Virginia) (1782–1865), U.S. Representative from Virginia
• William H. Armstrong (1914–1999), author of the children's book Sounder
• William Hepburn Armstrong (1824–1919), U.S. Representative from Pennsylvania
• William L. Armstrong (born 1937), U.S. Senator from Colorado
• William Armstrong, 1st Baron Armstrong (1810–1900), British industrialist
• William Armstrong, Baron Armstrong of Sanderstead (1915–1980), British civil servant
• William Armstrong (detective), detective on the Zodiac Killer case
• William Armstrong, American automobile inventor and founder of Armstrong Electric
• William "Duff" Armstrong (1833–1889), 1858 defendant for the murder of James Preston Metzker in Mason County, Illinois
• William T. Armstrong (1929–2005), Canadian Broadcasting Corporation executive
• William W. Armstrong (journalist) (1806–1878), U.S. journalist and politician from Ohio
• William W. Armstrong (1864–1944), U.S. lawyer and politician in New York state
• William Ward Armstrong, a Canadian mathematician and computer scientist.
• William Armstrong (footballer) (born 1892), Australian rules footballer
• William Armstrong (music critic) (1858–1942), American music critic
• Billy Armstrong (born 1943), politician in Northern Ireland
• Bill Armstrong (coach), American college football coach
• Bill Armstrong (ice hockey b. 1966), ice hockey player
• Bill Armstrong (ice hockey b. 1970), ice hockey player and coach
• Bill Armstrong (footballer) (1913–1995), footballer
• Bill Armstrong (announcer), game show announcer