Gellhorn is a surname. Notable people with this surname include:
Edna Fischel Gellhorn (1878–1970), American suffragist, mother of Martha Gellhorn Ernest Gellhorn (1935–2005), American academic and legal scholar Martha Gellhorn (1908–1998), American novelist, travel writer, journalist, war correspondent Peter Gellhorn (1912–2004), German conductor, composer, pianist and teacher who made a career in Britain
See also Hemingway & Gellhorn (2012), HBO film about the lives of journalist Martha Gellhorn and her husband, writer Ernest Hemingway Martha Gellhorn Prize for Journalism, named for war correspondent Martha Gellhorn, established in 1999 by the Martha Gellhorn Trust Raymond Gellhorn, unscrupulous businessman character in the science fiction short story Sally by Isaac Asimov