William Jackson may refer to:
Bridge point Chief executive
Arts and entertainment
- William Jackson (organist born 1730) (1730–1803), referred to as Jackson of Exeter, English organist and composer
- William Jackson of Masham (1815–1866), English organist and composer
- William Henry Jackson (1843–1942), early photographer of the American West
- William Jackson (Scottish composer) (born 1955), Scottish composer
- William F. Jackson (1850–1936), American painter and art curator
Military
- William Jackson (pirate) (fl. 1639–1645), British pirate
- William Lowther Jackson (1825–1890), American Confederate general
- William Hicks Jackson (1835–1903), American Confederate general
- William Payne Jackson (1868–1945), U.S. Army general
- William Jackson (Australian soldier) (1897–1959), Australian recipient of the Victoria Cross
- Sir William Jackson (British Army officer) (1917–1999), British general, Governor of Gibraltar, military historian, and author
- William Francis Jackson (1886–1964), British Army officer
Politics and law
U.K.
- William Jackson (fl. 1601–1604), MP for Guildford and Haslemere
- Sir William Jackson, 1st Baronet (1805–1876), British MP for Newcastle-under-Lyme and Derbyshire North
- William Jackson, 1st Baron Allerton (1840–1917), English politician, Member of Parliament for Leeds
- William Jackson, 1st Baron Jackson (1893–1954), Member of Parliament for Brecon and Radnorshire, 1939–1945
U.S.
- William Jackson (secretary) (1759–1828), Secretary to the Philadelphia Convention and member of the U.S. Continental Army
- William Jackson (Massachusetts politician, born 1783) (1783–1855), US Congressman from Massachusetts
- William Terry Jackson (1794–1882), U.S. Representative from New York
- William Jackson (Saugus, Massachusetts), English-American pottery manufacturer and politician of the 1820s
- William A. Jackson, Black dispatches spy during the American Civil War
- William Humphreys Jackson (1839–1915), congressman from Maryland
- William Purnell Jackson (1868–1939), member of the United States Senate from Maryland
- William S. Jackson (died 1932), New York State Attorney General, 1907–1908
- William T. Jackson (Ohio politician) (1876–1933), mayor of Toledo, Ohio
- William Harding Jackson (1901–1971), United States National Security Advisor
- William M. Jackson (judge) (born 1953), associate judge on the Superior Court of the District of Columbia
Other political figures
- William Jackson (New Zealand politician) (1832–1889), New Zealand politician
- William Jackson (Canadian politician) (1858–1938), Canadian Member of Parliament
- William Jackson (Canadian administrator)
Religion
- William Jackson (journalist) (1737–1795), Irish preacher, journalist, playwright, radical, and spy
- William Jackson (bishop) (1751–1815), bishop of Oxford
- William Jackson (Archdeacon of Carlisle) (1792–1878), priest and academic
- William Jackson (Dean of Killala) (died 1885), Anglican priest in Ireland
- William Walrond Jackson (1811–1895), Bishop of Antigua 1860–1879
- William Jackson (Archdeacon of Killala) (died 1903)
- William Jackson (priest) (1838–1931), Rector of Exeter College, Oxford
- Ernest Jackson (priest) (William Ernest Jackson), 20th century Canadian Anglican priest
- William Henry Jackson (priest) (1889–1931), Anglican priest, missionary, and inventor of Burmese Braille
- William Kirk Jackson (1901–1981), member of the Governing Body of Jehovah's Witnesses
Science and medicine
- William Jackson (engineer) (1848–1910), Boston, Massachusetts city engineer, 1885–1910
- William Jackson (inventor) (1849–1915), Scottish mechanical engineer
- William Elvin Jackson (1904–1972), American aviation electronics engineer
- William M. Jackson (chemist) (born 1936), American researcher
Sports
- William Jackson (curler) (1871–1955), Scottish winner of the first Olympic gold medal in curling, Chamonix, 1924
- William Jackson (footballer) (1876–1954), Newton Heath F.C., Burnley F.C. and Wales international footballer
- Bill Jackson (first baseman) (William Riley Jackson, 1881–1958), American first baseman for the Chicago Whales
- William Jackson (pitcher) (fl. 1890–1906), American pitcher and outfielder for early minor leagues and Negro leagues
- William Jackson III (born 1992), American football player
Others
- William Jackson (Boston loyalist) (1731–1810), American Revolutionary era loyalist
- William Jackson (gangster) (1901–1961), American loan shark, enforcer and murder victim
- William K. Jackson (1913–2003), American architect, co-founder of KBJ Architects
- William Turrentine Jackson (1915–2000), American professor of history
- William Perry Jackson (born 1955), American serial killer
- William Jackson Food Group, food manufacturer in the United Kingdom