Jack Lewis
Jack Lewis may refer to:
Authors
- C.S. Lewis (1898–1963), British author, scholar, and theologian, known to his friends as "Jack"
 - Jack Lewis (screenwriter) (1924–2009), American screenwriter, stuntman, and U.S. Marine
 - Jack Lewis (author) (born 1964), American author and Motorcyclist magazine columnist
 
Sports
- Jack Lewis (baseball) (1884–1956), American player
 - Jack Lewis (equestrian) (born 1902), Irish Olympic equestrian
 - Jack Lewis (footballer, born 1902) (1902–?), Welsh footballer who played for Cardiff City and Newport County
 - Jack Lewis (footballer, born 1912) (1912–?), Welsh footballer who played for Stoke City
 - Jack Lewis (footballer, born 1919) (1919–2002), English footballer who played for Crystal Palace, Bournemouth and Reading
 - Jack Lewis (footballer, born 1948), Wales under-23 international footballer who played for Grimsby Town
 - Jackie Lewis (born 1936), British racing driver
 
Other
- Jack Windsor Lewis (1926–2021), British phonetician
 - Jack Lewis, Baron Lewis of Newnham (1928–2014), English chemist
 - Jack P. Lewis (born 1919), American Bible scholar
 - Jack Lewis (musician) (born 1980), American musician
 - Jack Patrick Lewis (born 1984), American politician
 - Jack Clark Lewis (1935-2022), President and CEO of Amdahl Corporation