Leiber is a German surname. Notable people with the surname include:
Fridolin Leiber (1853–1912), German painter Fritz Leiber (1910–1992), American writer of fantasy, horror and science fiction. Fritz Leiber, Sr. (1882–1949), American actor Hank Leiber (1911–1983), American baseball player Jerry Leiber (1933–2011), American songwriter and record producer Judith Leiber (1921–2018), American fashion designer Justin Leiber (1938–2016), American philosopher and science fiction writer Robert Leiber (1887–1967), German Roman Catholic priest
See also Nickname for members of the Royal Bavarian Infantry Lifeguards Regiment (Leibregiment) Lieber