Bill Cody (1846–1917) or Buffalo Bill was American frontiersman and showman.

Bill or William Cody may also refer to:

• Bill Cody (actor) (1891–1948), Hollywood B-movie actor
• Bill Cody Jr. (1925–1989), child actor and son of the above
• Bill Cody (rugby union) (1892–1968), rugby union player who represented Australia
• Bill Cody (hurler) (1915–2001), Irish hurler
• Bill Cody (American football) (born 1944), former National Football League linebacker
• William Francis Cody (1916–1978), American architect