William Armstrong
William Armstrong and its variations may refer to:
Politicians
- William Armstrong (corn merchant), local politician and corn merchant
- Bill Armstrong (Australian politician), member of the Parliament of Australia
- Billy Armstrong (politician), politician in Northern Ireland
- William Armstrong (Virginia politician), U.S. Representative from Virginia
- William Armstrong, Baron Armstrong of Sanderstead, British civil servant
- William Boardman Armstrong, lawyer and political figure in Nova Scotia, Canada
- William Drayton Armstrong, member of the Queensland Legislative Assembly
- William H. Armstrong (Wisconsin politician), Wisconsin legislator
- William Hepburn Armstrong, U.S. Representative from Pennsylvania
- William James Armstrong, merchant, miller and politician in British Columbia
- William L. Armstrong, U.S. Senator from Colorado
- William Armstrong (Tennessee politician), mayor of Nashville, Tennessee
- William W. Armstrong (journalist), American journalist and politician from Ohio
- William W. Armstrong (politician), American lawyer and politician in New York state
Artists
- William Armstrong (Canadian artist), Canadian artist
- Bill Armstrong (photographer), American fine art photographer
Sports
- Bill Armstrong (announcer), game show announcer
- Bill Armstrong (Australian footballer), former Australian rules footballer
- Bill Armstrong (American football coach), American college football coach
- Bill Armstrong (English footballer), English footballer
- Bill Armstrong (guard), American football player
- Bill Armstrong (defensive back), 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), American college basketball coach
- William Armstrong (cricketer), Australian cricketer
- William Armstrong (footballer), Australian rules footballer
- William Armstrong (rugby league), rugby league footballer of the 1920s
Music
- Bill Armstrong (music producer), Australian music producer
- William Armstrong (music critic), American music critic
- Billie Joe Armstrong, American rock musician with Green Day
- Willie Armstrong, Newcastle upon Tyne-born singer-songwriter
Others
- William Armstrong (Christie's Will), Scottish border freebooter, known as "Christie's Will"
- William Armstrong, 1st Baron Armstrong, British industrialist
- Duff Armstrong, 1858 defendant for the murder of James Preston Metzker in Mason County, Illinois
- William H. Armstrong (author), author of the children's book Sounder
- William Nevins Armstrong, Attorney General of Hawaii
- William Armstrong (pilot), member of the Tuskegee Airmen
- William T. Armstrong, Canadian Broadcasting Corporation executive
- William Ward Armstrong, Canadian mathematician and computer scientist
- William Park Armstrong, theologian and New Testament scholar
- William Armstrong (theatre director), British actor, theatre manager and director
- Billy Armstrong (actor), British actor
- Billy Armstrong, alias of comics character Jeremy Karne