William Bauer may refer to:

Bill Bauer (American football), American football coach Bill Bauer (poet) (1932–2010), Canadian poet Billy Bauer (1915–2005), American musician William Edward Bauer (1926–2023), Canadian diplomat William J. Bauer (1926–2025), American judge William W. Bauer (1892–1967), American physician and health writer

Fictional characters Billy Bauer, in the UK science fiction anthology TV series Black Mirror, played by Topher Grace

See also Willy Bauer, German motocross racer