Gelb is a German surname meaning "yellow" and a nickname for man with red hair in Yiddish. People with the surname Gelb or Gelbs include:
Arthur Gelb, former managing editor of The New York Times
Bruce Gelb, an American businessman and diplomat
Howe Gelb, an American musician
Ignace Gelb (1907–1985), a Polish American ancient historian and Assyriologist
Jerry Gelb, an actor, voice actor, and voice casting professional
Lawrence M. Gelb (1898–1980), an American chemist
Leslie H. Gelb (born 1937), former correspondent for The New York Times and current President Emeritus of the Council on Foreign Relations
Michael H. Gelb, a biochemist and professor at the University of Washington
Michael J. Gelb, writer and trainer, specialising in personal development and corporate training seminars
Peter Gelb (born 1953), an American arts administrator
Richard L. Gelb (1924–2004), an American businessman
Steve Gelbs (born c. 1986-1987), an American sports reporter