Sportsmen
- John Walker (athlete) (born 1952), New Zealander winner of the Olympic Games 1500 metre run in 1976, and long-standing champion in the mile run
- John Walker (Middlesex cricketer) (1826–1885), cricketer and the eldest brother of the Walkers of Southgate
- John Walker (Surrey cricketer) (1768–1835), cricketer (brother of Tom and Harry Walker)
- John Walker (rower) (1891–1952), British coxswain and Olympic medalist
- John Walker (American football) (born 1983), former defensive back for the USC football team
- John Walker (fl. 1970s and 1980s), known as Mr. Wrestling II, masked professional wrestler
- John Walker (footballer) (1874–1940), Scottish international footballer
- John Walker (footballer born 1900) (1900–1971), footballer for Walsall and Stoke
- John Walker (fullback), English footballer
- John Walker (rugby league) (born 1987), English rugby league player
- John R. Walker (horseman), Canadian Hall of Fame horse trainer
- John Walker (tennis), Australian tennis player of the 1960s
- John Walker (cyclist), British Olympic cyclist
Read more about this topic: John Walker