•
Jack I. Abecassis, American scholar •
Jack Abel (1927–1996), American comic book artist •
Jack Abeillé (1873–1939), French painter and illustrator •
Jack Abramoff (born 1959), American lobbyist, businessman, movie producer, and writer, convicted of corruption •
Jack Acland (1904–1981), New Zealand politician •
Jack Adams (disambiguation), multiple people •
Jack Adler (1917–2011), American comics artist •
Jack Afamasaga (born 1984), Samoan professional rugby league footballer •
Jack Agazarian (1915–1945), British spy •
Jack Aikins (born 2002), American swimmer •
Jack Aitken (born 1995), British-Korean racing driver •
Jack Agüeros (1934–2014), author, playwright, poet and translator •
Jack Aker (born 1940), American Major League Baseball pitcher •
Jack Albertson (1907–1981), American actor •
Jack Anderson (disambiguation), multiple people •
Jack Angel (1930–2021), American actor •
Jack Antonoff (born 1984), American musician and producer •
Jack Arute (born 1950), American sportscaster •
Jack Asher (1916–1991), English cinematographer •
Jack Asselstine (1895–1966), Canadian ice hockey player •
Jack Avery (murder victim) (1911–1940), British War Reserve Constable •
Jack Avery (singer) (born 1999), American singer in the boy band Why Don't We •
Jack Babuscio (1937–1990), American journalist •
Jack Baigrie (1929–2008), Canadian television personality •
Jack Banta (disambiguation), multiple people •
Jack Barakat (born 1988), lead guitarist for punk rock band All Time Low •
Jack Bartley (1909–1929), English footballer •
Jack Baker (born 1942), one half of the first same-sex couple to be married legally with a license that was never revoked •
Jack Bech (born 2002), American football player •
Jack Benny (1894–1974), American comedian, vaudevillian, actor, and violinist •
Jack Black (born 1969), American actor •
Jack Blott (1902–1964), All-American football center and place kicker •
Jack Brodrick (1913–1965), rugby league player •
Jack Brabham (1926–2014), Australian racing driver •
Jack Brickhouse (1916–1998), American sportscaster •
Jack Brisco (1941–2010), American professional wrestler •
Jack Brittain, American professor •
Jack Browning (born 2001), American football player •
Jack Bruce (1943–2014), Scottish musician, composer, and vocalist •
Jack Buck (1924–2002), American sportscaster •
Jack Burtch (1926–2015), American lawyer •
Jack Cade ( 1420–1450), the leader of a popular revolt against the government of England in 1450 •
Jack Campbell (born 1992), American ice hockey goaltender •
Jack W. Carter (1938–2019), American politician •
Jack Catley (born 1945), English footballer •
Jack Bridger Chalker (1918–2014), British artist and teacher •
Jack L. Chalker (1944–2005), American science fiction author •
Jack Charlton (1935–2020), English footballer and manager •
Jack Chesbro (1874–1931), American Major League Baseball pitcher •
Jack T. Chick (1924–2016), American publisher, writer, and comic book artist of evangelical fundamentalist Christian tracts and comic books •
Jack Ciattarelli (born 1961), American politician and businessman •
Jack Cichy (born 1996), American football player •
Jack Cirilo (born 1999), Peruvian footballer •
Jack Clarke (1933–2001), Australian rules footballer and coach in the VFL •
Jack Clement (1931–2013), American singer-songwriter, record producer •
Jack Clifford (disambiguation), several people •
Jack Cock (1893–1966), English footballer •
Jack Colman (1887–1965), New Zealand rugby union player •
Jack E. Conger (1921–2006), American Marine flying ace during World War II •
Jack Kent Cooke (1912–1997), Canadian entrepreneur •
Jack Coombs (1882–1957), Major League Baseball pitcher •
Jack Cork (born 1989), English footballer •
Jack Crawford (disambiguation), multiple people •
Jack Crisp (born 1993), Australian rules footballer •
Jack Cronin (1874–1929), American Major League Baseball pitcher •
Jack Cronin (American football) (1903–1993), American football player •
Jack Crook (born 1993), English basketball player •
Jack Cross (1887–1948), Canadian ice hockey player •
Jack Cushing (born 1996), American baseball player •
Jack Cust (born 1979), American baseball player •
Jack Daly (politician) (1915–1988), Irish politician •
Jack Daniels (disambiguation), multiple people •
Jack Dann (born 1945), American writer • Jack Carl Dean, better known by alias
JaackMaate, British YouTuber •
Jack Dee (born 1961), English stand-up comedian, actor, and writer •
Jack DeJohnette (1942–2025), American jazz drummer, pianist, and composer •
Jack DeLeon (1924–2006), American actor •
Jack Del Rio (born 1963), American football coach •
Jack Dempsey (disambiguation), multiple people •
Jack Dickin (1899–1966), British Olympic swimmer •
Jack Diment (died 1978), Scottish footballer •
Jack Doan (born 1972) American professional wrestling referee •
Jack Dootson (1914–1985), American politician •
Jack Dorsey (born 1976), American technology entrepreneur, co-founder and CEO of Twitter •
Jack Douglass (born 1988), American YouTube comedian of "jacksfilms" fame •
Jack Dowsey (1905–1942), English footballer •
Jack Driscoll (American football) (born 1997), American football player •
Jack Dromey (1948–2022), British Labour Party politician and trade unionist •
Jack Dugger (1923–1988), American football player •
Jack Dugnolle (1914–1977), English footballer •
Jack Duncliffe (born 1947), English footballer •
Jack Easterby (born 1982 or 1983), American football executive •
Jack Dyer (1913–2003), Australian rules footballer and coach, broadcaster and journalist •
Jack Eichel (born 1996), American National Hockey League player •
Jack Eisner (born 1947), Israeli basketball player •
Jack Elam (1920–2003), American actor •
Jack Elder (politician) (born 1949), New Zealand politician •
Jack Ellena (1931–2012), American football player •
Jack Elway (1931–2001), American football player and head coach •
Jack Ely (1943–2015), American guitarist and singer •
Jack Endino (born 1964), producer and musician based in Seattle •
Jack Evans (disambiguation), multiple people •
Jack Faber (1903–1994), American microbiologist and college football and lacrosse coach •
Jack Falahee (born 1989), American actor •
Jack Fellure (1931–2022), American perennial political candidate and engineer •
Jack Fettes (born 2005), British basketball player •
Jack Fingleton (1908–1981), Australian cricketer •
Jack Finney (1911–1995), American author •
Jack Flagerman (1922–2005), American football player •
Jack Flaherty (disambiguation), multiple people •
Jack Flatley (born 1994), English professional boxer •
Jack Fleck (1921–2014), American professional golfer •
Jack Foley (disambiguation), multiple people •
Jack Fortner, Member of the Arkansas House of Representatives •
Jack Fox (disambiguation), multiple people •
Jack Fritz (disambiguation), multiple people •
Jack Fultz (born 1948), American long-distance runner •
Jack Gamble, British footballer •
Joaquín "Jack" García (born 1952), Cuban-American FBI agent •
Jack Garfinkel (1918–2013), American basketball player •
Jack Givens (born 1956), American collegiate and professional basketball player •
Jack Glasscock (1857–1947), American Major League Baseball player •
Jack Gilinsky (born 1996), member of the American pop-rap duo Jack & Jack •
Jack Gingrass (1921–2010), American politician •
Jack Gold (1930–2015), British film and television director •
Jack Goody (1919–2015), British social anthropologist •
Jack Gotta (1929–2013), American-born Canadian football player, coach, and general manager •
Jack Gore (actor) (born 2005), American actor •
Jack Graf (1919–2009), American football and basketball player •
Jack Graney (1886–1978), Canadian Major League Baseball player •
Jack Grant (disambiguation), multiple people •
Jack Dylan Grazer (born 2003), American actor •
Jack Grealish (born 1995), English footballer •
Jack Greenwell (1884–1942), English footballer and manager •
Jack Griffo (born 1996), American actor •
Jack Haden (1914–1996), American football player •
Jack Hale (disambiguation), multiple people •
Jack Haley (disambiguation), multiple people •
Jack Halliday (American football) (1928–2000), American football player •
Jack Ham (born 1948), American football linebacker •
Jack Hand (1912–1995), American sports reporter •
Jack Hanna (born 1947), American zookeeper •
Jack Hannah (1913–1994), American animator, writer, and director of animated shorts •
Jack Harkness (born 2004), Scottish footballer •
Jack Harper (disambiguation), multiple people •
Jack Heflin (born 1998), American football player •
Jack Heinemann, New Zealand academic •
Jack Hennig (born 1946), Canadian singer-songwriter •
Jack Herer (1939–2010), American cannabis activist •
Jack Heyes (1902–?), English footballer •
Jack Hill (disambiguation), multiple people •
Jack Hinchy (born 2003), English footballer •
Jack Hinshelwood (born 2005), English footballer •
Jack Hirsch (born 1941 or 1942), American basketball player and coach •
Jack Hirsh (born 1935), Canadian clinician and scientist •
Jack Hobbs (1882–1963), English cricketer •
Jack Hoffman (American football) (1930–2001), American football player •
Jack Hollington (born 2001), British actor •
Jack Holt (disambiguation), multiple people •
Jack Hopkins, English footballer •
Jack Hughes (disambiguation), multiple people •
Jack Hui (born 1988), Chinese academic •
Jack Hurley (1897–1972), American boxing promoter •
Jack Hurley (baseball) (born 2002), American baseball player •
Jack Huston (born 1982), English actor •
Jack Hyles (1926–2001), figure in the American Independent Baptist movement •
Jack Iddon (1902–1946), English cricketer •
Jack Ikin (1918–1984), English cricketer •
Jack Ingram (disambiguation), multiple people •
Jack Iroga (born 1986), sprinter from the Solomon Islands •
Jack Irons (born 1962), American musician •
Jack Irvin (1929–2008), American politician •
Jack Ivankovic (born 2007), Canadian ice hockey player •
Jack Iverson (1915–1973), Australian cricketer •
Jack Jacobs (disambiguation), multiple people •
Jack Jewsbury (born 1981), American soccer player •
Jack Johnson (disambiguation), multiple people •
Jack Jones (disambiguation), multiple people •
Jack Kamen (1920–2008), American illustrator •
Jack Katz (businessman) (born c. 1943), American businessman •
Jack Keane (born 1943), four-star general, former Vice Chief of Staff of the United States Army, and defense analyst •
Jack D. Keene (born 1947), American professor •
Jack Kemp (1935–2009), American politician and collegiate and professional footballer •
John F. Kennedy (1917–1963), American president, often called "Jack" •
Jack Kerouac (1922–1969), American novelist •
Jack Ketch (died 1686), English executioner employed by King Charles II •
Jack Kevorkian (1928–2011), American doctor •
Jack Kilby (1923–2005), American electrical engineer •
Jack Kirby (disambiguation), multiple people •
Jack Klugman (1922–2012), American actor •
Jack Kornfield (born 1945), American author and teacher in the vipassana movement in American Theravada Buddhism •
Jack Kotelawala (1910–1992),
Sri Lankan Ambassador to the Soviet Union from 1969-1970 •
Jack Kruger (born 1994), American professional baseball player •
Jack Ladyman (born 1947), American politician •
Jack Lambert (disambiguation), multiple people •
Jack Langer (born 1948/1949), American basketball player and investment banker •
Jack Larsen (baseball) (born 1995), American baseball player •
Jack Larson (1928–2015), American actor •
Jack Lausch, American football player •
Jack Layton (1950–2011), Canadian politician •
Jack Lea (born 1994), rugby player •
Jack Leathersich (born 1990), American baseball player •
Jack Le Brocq (born 1992), Australian racing driver •
Jack Lemmon (1925–2001), American actor •
Jack de Leon, (1902–1956), British theatre manager, impresario and playwright •
Jack Lew (born 1955), American government administrator, attorney, and 76th
United States Secretary of the Treasury •
Jack Donald Lewis (born 1938), wealthy zookeeper who disappeared in 1997 •
Jack Leyfield (1923–2014), English footballer •
Jack Lindsay (1900–1990), Australian-born British writer and poet •
Jack Lindsay (footballer) (1921–2006), Scottish footballer •
Jack Loach (born 1942), British businessman •
Jack London (disambiguation), multiple people •
Jack Lord (1920–1998), American actor •
Jack Lowden (born 1990), Scottish actor •
Jack Lynch (disambiguation), multiple people •
Jack Ma (born 1964), Chinese entrepreneur and philanthropist •
Jack Mack (1881–1960), Australian rules footballer •
Jack Mara (1908–1965), co-owner of the New York Giants football franchise •
Jack Markell (born 1960), American politician •
Jack Marley (born 2002), Irish boxer •
Jack Marsh (–1916), Australian first-class cricketer •
Jack Mates (1870–????), Welsh footballer •
Jack Mayfield (born 1990), American baseball player •
Jack McBrayer (born 1973), American comedic actor •
Jack McCall (1852/1853–1877), murderer of Old West legend
Wild Bill Hickok •
Jack McConnell (born 1960), Scottish politician, First Minister of Scotland 2001–2007 •
Jack McCracken (1912–1958), American basketball player in the 1930s and 1940s •
Jack McFetridge (1869-1917), Major League Baseball pitcher •
Jack McKinney (basketball) (1935–2018), American basketball coach •
Jack McKinney (writer), pseudonym used by American authors James Luceno and Brian Daley •
Jack McVite (1932–1967), British criminal •
Jack Meanwell (1919–2005), Canadian artist and art teacher •
Jack Meltzer (1921–2010), American academic •
Jack Merriott (1901–1968), English writer and artist •
Jack Moehle, American academic •
Jack Moore (disambiguation), multiple people •
Jack Morelli (born 1962), American comic book letterer •
Jack Morrell (born 1955), American boxer •
Jack Morris (born 1955), American Major League Baseball pitcher •
Jack Maumbe Mukhwana (1939–2017), Ugandan politician •
Jack Mulcair (1889–1953), Canadian ice hockey player •
Jack Nance (1943–1996), American actor •
Jack Narz (1922–2008), American television announcer and game show host •
Jack Nasher (born 1979), German business psychologist, author, and professor •
Jack Francis Needham (1842–1924), British police officer •
Jack Nelson (disambiguation), multiple people •
Jack Neo (born 1960), Singaporean film and television actor, host, and director •
Jack Nevin, American lawyer •
Jack Newman (disambiguation), multiple people •
Jack Nicholson (born 1937), American actor •
Jack Nicklaus (born 1940), American golfer •
Jack Nitzsche (1937–2000), American musician, arranger, producer, songwriter, and film score composer •
Jack Novak (born 1953), American professional footballer •
Jack Null (1924–2003), American college basketball coach •
Jack Oakie (1903–1978), American actor •
Jack O'Connell (disambiguation), multiple people •
Jack Ohman (born 1960), American editorial cartoonist •
Jack Okey (1889–1963), American art director •
Jack Oleck (1914–1981), American novelist and comic book writer •
Jack Olsen (1925–2002), American journalist and author •
Jack O'Neill (disambiguation), multiple people •
Jack Osbourne (born 1985), English media personality •
Jack O'Shea (born 1957), Irish Gaelic footballer •
Jack Otter, American journalist •
Jack Owen (disambiguation), multiple people •
Jack Oyugi, Kenyan entrepreneur •
Jack Paar (1918–2004), American author, comedian, and talk show host •
Jack Palance (1919–2006), American actor •
Jack Pardee (1936–2013), American National Football League player and head coach •
Jack Parsons (disambiguation), multiple people •
Jack Patera (1933–2018), American footballer and coach in the National Football League •
Jack Paterson (born 1974), Canadian director, devisor, dramaturg, translator, actor •
Jack Paton (1881–1935), Scottish cricketer •
Jack Pearsall (1915–1982), Canadian politician •
Jack Peart (1888–1948), English footballer •
Jack Pickersgill (1905–1997), Canadian civil servant and politician •
Jack Piddington (1910–1997), Australian research physicist and radio scientist •
Jack M. Poorbaugh (1919–1987), American politician •
Jack Powell (disambiguation), multiple people •
Jack Joseph Puig, American music engineer and producer •
Jack Pyle (1909–1987), American stage magician •
Jack Quaid (born 1992), American actor •
Jack Quinlan (1927–1965), American sportscaster •
Jack Quinn (disambiguation), multiple people •
Jack N. Rakove (born 1947), American historian, author, professor, and Pulitzer Prize winner •
Jack Ralite (1928–2017), French politician •
Jack Rampton (1920–1994), British civil servant •
Jack Ramsay (1925–2014), American basketball coach •
Jack Reed (disambiguation), multiple people •
Jack Regan (disambiguation), multiple people •
Jack Remmington (born 1994), English influencer and presenter •
Jack Rieley (1942–2015), American record producer •
Jack Riewoldt (born 1988), Australian rules footballer •
Jack River (born Holly Rankin, 1991), Australian singer-songwriter •
Jack Rogers (born 1937), American politician •
Jack Rosenthal (1931–2004), English playwright •
Jack Roush (born 1942), American founder, CEO, and co-owner of Roush Fenway Racing •
Jack Ruby (1911–1967), American nightclub operator who killed
Lee Harvey Oswald •
Jack Russell (disambiguation), multiple people •
Jack Sack (1902–1980), American football player and coach •
Jack Saul, South African-Israeli tennis player •
Jack Sawyer (born 2002), American football player •
Jack Shepherd (disambiguation), multiple people •
Jack Shirai (died 1937), Japanese-American activist, trade unionist, and soldier •
Jack Shonkoff, American pediatrician •
Jack Sikma (born 1955), American National Basketball Association center •
Jack Snelling (born 1972), Australian politician •
Jack Sock (born 1992), American professional tennis and pickleball player •
Jack Soren, pen name of Martin Richard Soderstrom, Canadian writer •
Jack Souther (1924–2014), American-Canadian geologist •
Jack Stauber (born 1996), American musician, YouTuber and animator •
Jack Steinberger (1921–2020), American physicist •
Jack Stoll (born 1998), American football player •
Jack Straw (born 1946), British politician •
Jack Sullivan (disappeared 2025), Canadian missing person •
Jack Suwinski (born 1998), American baseball player •
Jack Swagger (born 1982), American wrestler •
Jack Sweeney, American programmer and entrepreneur •
Jack Swift (born 1985), Australian paratriathlete •
Jack Taggart (1950–2022), Canadian ice hockey player •
Jack Talty, Irish musician •
Jack Tatum (1948–2010), American National Football League player •
Jack Taylor (born 1990), American basketball player •
Jack Tchienchou (born 2005), American football player •
Jack Thrasher (1938–2017), American immunotoxicologist •
Jack Tighe (1913–2002), American Major League Baseball head coach •
Jack Titus (1908–1978), Australian rules footballer •
Jack Tocho (born 1995), American football player •
Jack Townend (1918–2005), British illustrator and graphic artist •
Jack Trice (1902–1923), American football player •
Jack Troy (1928–1995), Australian rugby league footballer •
Jack Turner (born 2002), English professional boxer •
Jack Twyman (1934–2012), American basketball player and sports broadcaster •
Jack Ulrich (1890–1927), Canadian ice hockey player •
Jack Underman (1925–1969), American basketball player •
Jack Underwood (1894–1936), American football player •
Jack Unruh (1935–2016), American commercial illustrator •
Jack Unterweger (1950–1994), Austrian serial killer •
Jack Urban (1928–2006), Major League Baseball pitcher •
Jack Vale (disambiguation), multiple people •
Jack Valenti (1921–2007), American political advisor and lobbyist, president of the Motion Picture Association of America •
Jack Van Berg (1936–2017), American Hall-of-Fame horse trainer •
Jack Van Impe (1931–2020), American televangelist •
Jack Vance (1916–2013), American science fiction, fantasy, and mystery writer •
Jack Veal (born 2007), British child actor •
Jack Vettriano (1951–2025), Scottish painter •
Jack Victory (born 1964), American professional wrestler and manager •
Jack Vidgen (born 1997), Australian singer •
Jack Viney (born 1994), Australian rules footballer •
Jack Voigt (born 1966), Major League Baseball outfielder •
Jack Vosti (1903–1977), Australian rules footballer •
Jack Waite (born 1969), American tennis player •
Jack Walker (1929–2000), British industrialist, and owner of Blackburn Rovers F.C. •
Jack Ward, Canadian ice hockey player •
Jack Warden (1920-2006), American actor •
Jack Warner (disambiguation) •
Jack Webb (1920–1982), American actor, television producer, director, and screenwriter •
Jack Wenninger (born 2002), American baseball player •
Jack Welch (disambiguation) •
Jack Whitam, English actor •
Jack White (disambiguation) •
Jack Whitehall (born 1988), English comedian, presenter, actor, and writer •
Jack Whitman (died 2004), American paralympic archer and dartcher •
Jack Wild (1952–2006), English actor •
Jack Wilkie-Jans, Aboriginal affairs advocate •
Jack Williamson (1908–2006), American science fiction writer •
Jack Wilshere (born 1992), English footballer •
Jack Wilson (1937–1997), Irish novelist •
Jack Winkler (born 1998), American baseball player •
Jack Witikka (1916–2002), Finnish film director •
Jack Arthur Wood Jr. (1923–2005), American state senator of Idaho •
Jack Wong (born 1998), tennis player from Hong Kong •
Jack Woodbridge (1956–2023), American pianist, singer and composer •
Jack Liangjie Xu, co-president and chief technology officer of SINA Corporation •
Jack Yan (born 1972), New Zealand publisher, designer, and businessman •
Jack Yang, American computer scientist and biophysicist •
Jack Yarber (born 1967), American singer, songwriter, and guitarist •
Jack Yeandle (born 1989), English rugby union player •
Jack Yellen (1892–1991), American lyricist and screenwriter •
Jack Yerman (born 1939), American former sprinter •
Jack Yost (born 1945), American politician •
Jack Youngblood (born 1950), American college and professional footballer •
Jack Youngerman (1926–2020), American artist •
Jack Zajac (born 1929), American artist •
Jack Zduriencik (born 1951), Major League Baseball general manager •
Jack Zelig (1888–1912), American gangster •
Jack Zeller (1883–1969), American baseball executive •
Jack Zhao (born 1969), Chinese contract bridge player •
Jack Ziebell (born 1991), Australian rules footballer •
Jack Zilly (1921–2009), American football player •
Jack Zipes (born 1937), American professor of German •
Jack Zouhary (born 1951), American federal judge •
Jack Zunz (1923–2018), British civil engineer, former chairman of Ove Arup & Partners ==People with the nickname==