Billy Walker may refer to:

• Billy Walker (footballer, born 1897) (1897–1964), English footballer of the 1920s and 1930s, later a football manager
• Billy Walker (footballer, born 1879) (1879–?), English footballer
• Billy Walker (boxer) (born 1939), English heavyweight boxer of the 1960s
• Billy Walker (musician) (1929–2006), American country music singer and guitarist
• Billy Walker (Scottish footballer) (1893–after 1925), Scottish footballer of the 1910s and 1920s
• Billy Walker (Coronation Street), a fictional character in the British soap opera Coronation Street
• Billy Walker (rugby union) (born 1996), English rugby tighthead prop
• Billy Joe Walker Jr. (1952–2017), session guitarist and New Age musician