Slack is a surname. Notable people with the surname include:
Politics, law and the military Clayton K. Slack (1896–1976), United States Army private awarded the Medal of Honor Doug Slack (born 1941), Australian former politician George Slack (1874–1950), American politician Granville Slack (1906–2003), British judge and politician James Slack, British political advisor and journalist, former official spokesperson and Director of Communications for former prime minister Boris Johnson James R. Slack (1818–1881), American state senator and Union Army brigadier general and brevet major general Jerald D. Slack (1936–2024), US Air National Guard major general John Slack (cricketer) (1930–2012), English cricketer and judge John Bamford Slack (1857–1909), British politician and Methodist lay preacher John M. Slack Jr. (1915–1980), American politician Leighton P. Slack (1867–1938), American state senator, lieutenant governor of Vermont and justice of the Vermont Supreme Court Lemuel Ertus Slack (1874–1952), American state senator and lawyer Thomas Kerr Slack (1875–1956), Canadian politician Timothy Slack (1913–1976), American politician William Y. Slack (1816–1862), American lawyer, politician and Confederate officer
Science Adrian Slack (1933–2018), British landscape gardener, plantsman, author and authority on carnivorous plants Francis G. Slack (1897–1985), American physicist Harry Slack (1907–1982), British zoologist Nancy Guttmann Slack (1930–2022), American plant ecologist, bryologist and historian of science Roger Slack (1937–2016), British plant biologist and biochemist
Sports Andrew Slack (born 1955), Australian rugby union player Bill Slack (born 1933), Canadian retired baseball pitcher, manager and coach, member of the Canadian Baseball Hall of Fame Bill Slack (footballer) (1906–1989), English footballer Charlie Slack (1931–2020), American college basketball player Henry James Slack (1818–1896), English journalist, liberal activist and science writer Hiram Slack (Nottinghamshire cricketer) (1808–1853) Hiram Slack (North of England cricketer) (1843–1918), nephew of the above Jackie Slack (born 1959), British former footballer John Slack (cricketer) (1930–2012), English cricketer and judge Laurie Slack (1915–1991), Australian rules footballer Mel Slack (1944–2016), English footballer Pres Slack (1908–1993), American National Basketball Association player Reggie Slack (born 1968), American former football quarterback Rodney Slack (born 1940), English former football goalkeeper Shanon Slack (born 1984), American mixed martial artist Stuart Slack (1935–1998), racing cyclist, musician and folk songwriter from the Isle of Man Trevor Slack (born 1962), English former footballer Wilf Slack (1954–1989), English cricketer
Other Agnes Elizabeth Slack (1858–1946), English Temperance advocate Ben Slack, American actor, known for Bachelor Party Eliza Fraser (c. 1798–1858), née Slack, English shipwreck victim who claimed to have been captured by Australian Aborigines Freddie Slack (1910–1965), American swing and boogie-woogie pianist and bandleader Paul Slack (born 1943), British historian Samuel Slack (1757–1822), English bass singer William Slack (surgeon) (1925–2019), dean of UCL Medical School and Serjeant Surgeon to Queen Elizabeth II
See also General Slack (disambiguation) Senator Slack (disambiguation)