Hornig is a surname. Notable people with the surname include:
Carola Hornig (born 1962), German rower Charles Hornig (1916–1999), one of the earliest contributors to the science fiction genre Donald Hornig (1920–2013), American chemist, explosives expert, pushed the button on Trinity, teacher and presidential science advisor Ernst Hornig (1894–1976), German Bishop of the Evangelical Church of Silesia Florian Hörnig (born 1986), German footballer Heinz Hornig (born 1937), former German football player Irina Hornig, skydiver who competed for the SC Dynamo Hoppegarten/ Sportvereinigung (SV) Dynamo Joan Hornig, American jewelry designer Johannes Hörnig (1921–2001), East German politician Károly Hornig (1840–1917), Austrian-Hungarian Cardinal of the Roman Catholic Church Lilli Hornig (1921–2017), American chemist involved in the Manhattan Project, and feminist Mady Hornig (born 1957), psychiatrist, associate professor of epidemiology at Columbia University Manuel Hornig (born 1982), German football player Rudi Hornig (1938–2014), German boxer Sabine Hornig (born 1964), German visual artist and photographer who lives and works in Berlin
See also Honig Hornick (disambiguation) Hornigi Hornik Horniki Horning