William Hamilton (and shortened forms) may refer to:
Europeans
- William Hamilton (Lord Chancellor), (d. 1307) Lord Chancellor of England
- William Hamilton, 2nd Duke of Hamilton (1616–1651), Scottish nobleman
- Sir William Hamilton, 1st Baronet (1627 – c. 1680)
- William Hamilton (poet) (1665-1751), Scottish poet
- William Hamilton (educator) (1669-1732), Principal of the University of Edinburgh
- William Hamilton (Jacobite poet) (1704-1754), Scottish poet associated with the Jacobite movement
- William Gerard Hamilton (1729 – 1796), English statesman
- Sir William Hamilton (diplomat) (1730-1803), Scottish diplomat and husband of Emma Hamilton
- William Hamilton (painter) (1751-1801), English painter
- William Richard Hamilton (1777-1859), English antiquarian and traveller
- William Hamilton (botanist) (1783-1856)
- Sir William Hamilton, 9th Baronet (1788-1856), Scottish metaphysician
- Sir William Rowan Hamilton (1805-1865), Irish mathematician
- William Hamilton, 11th Duke of Hamilton (1811 – 1863) Scottish nobleman
- William Hamilton (criminal) who shot at Queen Victoria in 1849.
- William Douglas-Hamilton, 12th Duke of Hamilton (1845 – 1895) Scottish nobleman
- William Hamilton (cricketer) (1859-1914), Irish cricketer
- William Hamilton (tennis player) (1869-1943), Irish tennis player (real name Willoughby Hamilton), winner of the 1890 Wimbledon championships
- William Hamilton (soldier) (1891-1917), Soldier and poet from Victoria Barracks, Windsor
- Willie Hamilton (1917-2000), anti-monarchist British MP
- W. D. Hamilton (1936-2000), British biologist
- Willie Hamilton (footballer) (1938-1976), Scottish footballer
- Billy Hamilton (footballer) (born 1957), Northern Irish footballer
North Americans
- William Hamilton (landscape designer) (1745-1813), horticulturist, landscape designer, developer of "The Woodlands" in Philadelphia
- William Hamilton (lumber baron) (??-1822), lumber merchant and political figure in Upper Canada.
- William Hamilton (abolitionist) (1773-1836) Black abolitionist, carpenter, and journalist. Claimed to be an illegitimate son of Alexander Hamilton.
- Colonel William Sutherland Hamilton, (1789-1867?) plantation owner, of Laurel Hill, Louisiana.
- William S. Hamilton (1797-1850), son of Alexander Hamilton, well-known miner, politician and soldier.
- William Thomas Hamilton (1820-1888), Governor of Maryland (1880-1884)
- William Hamilton (trapper) (1822-1908), American trapper, "Wildcat Bill"
- Billy Hamilton (baseball) (1866-1940), American Major League Baseball player
- William F. Hamilton (born 1884), 1908 Olympic gold medalist
- William Hamilton (film editor) (1893-1942), film editor
- William Ernest Hamilton (1902-1985), politician in Ontario, Canada
- William McLean Hamilton (1919 – 1989) Canadian politician
- William J. Hamilton (born 1932), Speaker of the New Jersey General Assembly (1977)
- William B. Hamilton, (1938-?), champion golfer of many clubs
- Billy Ray Hamilton (died 2007) American murderer
- Billy Hamilton (singer) bassist for the Canadian band Silverstein
Others
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