William Hammond may refer to:

Sports

• William Hammond (cyclist) (1886–?), British Olympic road racing cyclist
• William Hammond (fencer) (1872–?), British Olympic fencer at the 1920 and 1924 Olympics
• William Hammond (cricketer) (fl.1855–1868)

Politicians

• William Hammond (died 1763), British Member of Parliament for Southwark
• William Hammond (died 1575), MP for Guildford

Others

• William Hammond (died 1685) (c.1635–c.1685), Original Fellow of the Royal Society
• William Hammond (1707–1787), Danish landowner
• William Hammond (hymnist) (1719–1783), English hymnist
• William A. Hammond (1828–1900), neurologist, 11th US Army Surgeon General
• Bill Hammond (1947–2021), New Zealand artist
• William Hammond (ship), a barque used to transport convicts to Western Australia
• William Hammond (historian), American historian
• William Archie Hammond, founder of the W.A. Hammond Drierite Company
• William C. Hammond (born 1947), American novelist of historical fiction
• William Churchill Hammond (1860–1949), American organist and music educator

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