William Grant may refer to:
Politicians
- Sir William Grant (Master of the Rolls) (1752âÂÂ1832), Member of the Parliament, 1790âÂÂ1812; Master of the Rolls, 1801âÂÂ1817
- William Grant (Northern Ireland politician) (1883âÂÂ1949), Unionist M.P. for the Northern Ireland House of Commons
- William Grant (seigneur) (1744âÂÂ1805), Scottish-born businessman, seigneur and political figure in Lower Canada
- William Grant, Lord Grant (1909âÂÂ1972), Scottish Unionist politician and judge
- William Grant, Lord Prestongrange (1701âÂÂ1764), Scottish politician and judge
- William M. Grant (1868âÂÂ1931), politician in Saskatchewan, Canada
Sportsmen
Military
Others
- William Grant (businessman) (1839âÂÂ1923), founder of the company William Grant & Sons, which distils Scotch whisky and other spirits
- William Grant (fur trader) (1743âÂÂ1810), Scottish-born fur trader in Lower Canada
- St. William Grant (1894âÂÂ1977), Jamaican trade unionist and activist
- William Grant (New Zealand) (1843âÂÂ1910), New Zealand shepherd, stock dealer, landowner
- William Grant Naboré, American classical pianist
- William F. Grant (born 1924), Canadian plant geneticist, biosystematist, educator, and environmental advocate
- William Thomas Grant (1876âÂÂ1972), American philanthropist and founder of the W. T. Grant stores
- William James Grant (1829âÂÂ1866), English painter
- William Grant (priest), Archdeacon then Dean of Tuam
- William K. Grant, American diplomat
- William Grant (physician) (died 1786), Scottish physician
- William Grant (1873âÂÂ1932), journalist and founder of the Stornoway Gazette
- William Grant, see Fred M. Hechinger Grand Prize for Distinguished Education Reporting
See also