William Lamb may refer to:
Bill Lamb (politician), member of the Alabama House of Representatives William Lamb, 2nd Viscount Melbourne (1779–1848), Prime Minister of the United Kingdom William Lamb (sculptor) (1893–1951), Scottish artist William Lamb (Confederate States Army officer) (1835–1909) William Lamb alias Paniter (died 1550), Scottish author William F. Lamb (1883–1952), principal designer of the Empire State Building William Kaye Lamb (1904–1999), Canadian historian pseudonym of Storm Jameson (1891–1986), English journalist and author
See also William Lambe (disambiguation)