Jack Smith may refer to:

• Jack Smith (Port Vale), footballer in 1892–1895
• Jack Smith (footballer, born 1882) (1882 – after 1911), English player with Wolverhampton Wanderers and others
• Jack Smith (footballer, born 1895) (1895–1946), Scottish player with Bolton Wanderers
• Jack Smith (footballer, born 1898) (1898–1977), English international footballer
• Jack Smith (footballer, born 1901), English footballer for Bradford City and Blackburn Rovers, also known as John Smith
• Jack Smith (footballer, born 1910) (1910–1986), English player with Sheffield United
• Jack Smith (footballer, born 1911) (1911–1975), Welsh player with Wolves; manager of West Bromwich Albion and Reading
• Jack Smith (footballer, born 1915) (1915–1975), English player with Manchester United
• Jack Smith (footballer, born 1936) (1936–2008), English player with Swindon Town
• Jack Smith (footballer, born 1983), English player
• Jack Smith (footballer, born 1994), Scottish player
• Jack Smith (footballer, born 2001), English player
• Jack Smith (Australian footballer, born 1881) (1881–1927), Australian rules footballer for North Melbourne and Melbourne
• Jack Smith (Australian footballer, born 1909) (1909–1983), Australian rules footballer for St Kilda and North Melbourne
• Jack Smith (Gaelic footballer), Westmeath player
• Jack Smith (end) (1917–2015), American football end
• Jack Smith (defensive back) (born 1947), American football player

• Jack Smith (American racing driver, born 1924) (1924–2001), American NASCAR driver
• Jack Smith (American racing driver, born 1973) (born 1973), American NASCAR driver
• Jack Smith (Australian racing driver) (born 1999), Australian racing driver

• Jack Smith (outfielder) (1895–1972), Major League Baseball player
• Jack Smith (pitcher) (1935–2021), Major League Baseball player
• Jack Smith (third baseman) (1893–1962), Major League Baseball player

• Jack Smith (sportsman) (1936–2020), English cricketer and rugby union player
• Jack Smith (Australian cricketer) (born 1977), Australian cricketer
• Jack Smith (coach), American college football, baseball and basketball coach for Hofstra
• Jack Smith (speedway rider) (born 1998), British speedway rider
• Jack Smith (wheelchair rugby) (born 1991), British Paralympian

• Whispering Jack Smith (1896–1950), American musician
• Jack Martin Smith (1911–1993), Hollywood art director
• Smilin' Jack Smith (1913–2006), American crooner, radio/television host, and actor
• Jack Smith (columnist) (1916–1996), Los Angeles journalist
• John O'Neill (musician, born 1926) (1926–1999), English musician credited as Whistling Jack Smith
• Jack Smith (film director) (1932–1989), American underground film director
• John F. Smith, American soap opera writer
• Jack Thomas Smith (born 1969), American producer, writer and director

• Jack W. Smith (1882/83–?), British trade union activist
• Jack Smith (politician) (1901–1967), Liberal party member of the Canadian House of Commons
• Jack Carington Smith (1908–1972), Australian artist
• Jack Smith (artist) (1928–2011), British abstract artist
• John F. Smith Jr. (born 1938), American business executive, CEO of General Motors
• Jack Smith (Hotmail), co-founder of Hotmail
• Jack Smith (lawyer) (born 1969), American lawyer, special counsel for the Department of Justice

• Jack Smith (American Dad!), character in U.S. animated TV series American Dad!

• John Smith (disambiguation)
• Jackie Smith (disambiguation)