William Black (disambiguation)
William Black is the name of the following people:
- William Black (1841–1898), Scottish writer
- William Black (medic) (1749-1829), English physician, pharmacologist and medical historian
- William Black (Pastor) (1760–1834) British-American pastor
- William Black, Baron Black (1893–1984) British engineer and entrepreneur
- William Grant Black (1920–2013), American clergyman, Bishop of Southern Ohio
- William Murray Black (1855–1933), American general and engineer