People
* Quack Davis, American baseball player * Hendrick Peter Godfried Quack (1834–1917), Dutch economist and historian * Joachim Friedrich Quack (born 1966), German Egyptologist * Johannes Quack (born 1959), German ethnologist * Martin Quack (born 1948), German physical chemist * Niels Quack (born 1980), Swiss and German engineer * Sigrid Quack (born 1958), German social scientistFilm and television
* ''Quacks'' (TV series), a British comedy series about quackery * '' The Quack'' (), a 1982 Polish drama film * ''Znachor'' (1937 film), a Polish drama film * O. K. Quack, a character in the Scrooge McDuck universe * Quack, a duck in ''Music
* ''Quack'' (album), an album by the American-Canadian group Duck Sauce * ''The Quack'' (EP), a 2013 album by Australian electronic music project What So NotSport and games
* Quack (horse) (1969–1995), an American Thoroughbred racehorse * The Quack (horse), a 19th-century Australian Thoroughbred racehorse * The Quacks of Quedlinburg, a bag-building, push-your-luck board game, affectionately known as "Quacks" for short, designed by Wolfgang Warsch. * Quack, a portmanteau of queen and jack; see Glossary of contract bridge terms § QOther uses
* Quack (medicine), a person who practices quackery, the promotion of unproven or fraudulent medical practices *