Lieber is a surname. Notable people with the surname include:
Charles M. Lieber, professor of chemistry at Harvard UniversityErnst Maria Lieber, German politicianFrancis Lieber, jurist, author of the Lieber CodeJeffrey Lieber, screenwriterJon Lieber, baseball playerLarry Lieber, comic book writerLillian Rosanoff Lieber, mathematician/authorMaxim Lieber, American literary agent and communist spy in the 1930sRichard Lieber, conservationistRochelle Lieber, linguistStan Lee (born Lieber), comic book writer