Leiber is a German surname. Notable people with the surname include:
Fridolin Leiber (1853-1912), German painterFritz Leiber (1910-1992), American writer of fantasy, horror and science fiction.Fritz Leiber, Sr. (1882-1949), American actorHank Leiber (1911-1983), American baseball playerJerry Leiber (1933-2011), American songwriter and record producerJudith Leiber (born 1921), American fashion designerJustin Leiber (born 1938), American philosopher and science fiction writerRobert Leiber (1887-1967), German Roman Catholic priest