Unger may refer to:
- Unger (bishop of Poland) (died 1012), bishop of Poland, since 1000 bishop of Poznań
- Unger, West Virginia
- Unger Island, a small, ice-free island of Antarctica
Unger is a surname of German derivation, and may refer to:
- Anna Unger, East German cross country skier
- Betty Unger, Canadian politician
- Billy Unger, American actor
- Brian Unger, American comedian, writer, producer, and commentator
- Caroline Unger (1803–1877), Austrian contralto
- Chris Unger, American association football (soccer) player
- Corey Unger, American musician
- Craig Unger, American journalist and writer
- Daffney Unger, stage name of American wrestler Shannon Spruill
- David C. Unger (born 1947) American journalist
- Deborah Kara Unger, a Canadian actress
- Erich Unger (1887–1950), Jewish philosopher
- Felix Unger, fictional character in The Odd Couple
- Ferdinand Thomas Unger (1914-1999), American military officer
- Franz Unger (1800–1870), Austrian botanist
- Garry Unger (born 1947), Canadian professional ice hockey player
- Gerhard Unger (born 1916), German tenor
- Gerard Unger (born 1942), Dutch graphic developer of type fonts
- James Marshall Unger, American linguist
- Jim Unger (1937–2012), British-born cartoonist
- Joachim Jacob Unger, Austrian rabbi; born at Homonna, Hungary
- Johann Friedrich Unger (1753–1804), German printer
- Jonathan Unger, American journalist
- Joseph Unger (1828–1913), Austrian Jewish jurist and statesman; born in Vienna
- Lars Unger, (born 1972), German footballer
- Lisa Unger, American writer
- Markus Unger (born 1981), German footballer
- Merrill Unger (1909–1980), Bible commentator, scholar, and theologian
- Mordechai David Unger, Grand Rabbi of Bobover hasidim
- Oliver A. Unger, (1914–1981), American film and television producer
- Peter Unger, philosopher at New York University
- Roberto Mangabeira Unger, Brazilian politician, social theorist and law professor at Harvard
- Stephen A. Unger, (born 1946), American executive recruiter, media and entertainment business
- Stu Unger, American poker player
- Tobias Unger, German athlete, specialist in 100 m and 200 m