William Harrison
William Harrison may refer to:
- William Henry Harrison (1773–1841), ninth president of the United States in 1841
 
Politicians
- William Harrison (Canadian politician) (1834–1922), saddlemaker, historian and reeve of Richmond Hill, Ontario
 - William Harrison (MP) (baptised 1619 –1643), English Member of Parliament and Royalist soldier
 - William Harrison Jr. (c. 1750–1789), delegate for Maryland in the U.S. Continental Congress of 1786 and 1787
 - William A. Harrison (1795–1870), Virginia politician, West Virginia founder and Supreme Court Justice
 - William Alistair Harrison (born 1954), Governor of Anguilla
 - William B. Harrison (1889–1948), mayor of Louisville, Kentucky
 - William C. Harrison, chairman of North Carolina board of education
 - William H. Harrison (Wyoming politician) (1894–1991), Wyoming politician in the state house of representatives
 - William Henry Harrison III (1896–1990), American politician who served as a Republican U.S. representative from Wyoming
 - William Henry Harrison (Canadian politician) (1880–1955), Canadian politician in the Legislative Assembly of New Brunswick
 - William Henry Harrison (Georgia politician) (fl. 1843–1871), state legislator from Hancock County, Georgia
 - William Henry Harrison (New Zealand politician) (1831–1879), New Zealand politician
 - Bill Harrison (politician), mayor of Fremont, California
 
Sportsmen
- William Harrison (cricketer, born 1838) (1838–1912), English cricketer and British Army officer
 - William Harrison (cricketer, born 1875) (1875–1937), English cricketer and High Sheriff of Staffordshire
 - William Harrison (footballer, born 1858) (1858–1890), English footballer
 - William Harrison (Welsh footballer) (1872–?), Wrexham F.C. and Wales international footballer
 - William Hendy Harrison (1863–1939), English cricketer
 - William Henry Harrison (cricketer) (1866–1936), English cricketer
 - Bill Harrison (ice hockey), American ice hockey coach
 - Billy Harrison (Australian footballer) (1884–1964), Australian rules footballer
 - Billy Harrison (footballer, born 1886) (William Ewart Harrison, 1886–1948), English football player
 - Billy Harrison (footballer, born 1901) (William Harrison, 1901–1984), English football player
 - Billy Harrison (rugby league) (William Rapihana Harrison, 1938–2021), rugby league footballer of the 1960s for New Zealand, and Wellington
 - Will Harrison (rugby union) (born 1999), Australian fly-half
 
Clergymen
- William Harrison (Archpriest of England) (c. 1553–1621), English Roman Catholic priest
 - William Harrison (bishop) (1837–1920), Anglican bishop
 - William Harrison (priest) (1534–1593), English clergyman
 - William P. Harrison (1830–1895), Methodist minister and theologian, Chaplain of the United States House of Representatives
 
Servicemen
- William Harrison (sea captain) (1812–1860), British merchant navy officer
 - William H. Harrison (USMC) (1896–1955), United States Marine Corps general
 - William Hardin Harrison (1933–2024), retired U.S. Army lieutenant general
 - William Kelly Harrison (1870–1928), U.S. Navy officer and Medal of Honor recipient
 - William Kelly Harrison Jr. (1895–1987), U.S. Army officer
 - William Leeming Harrison (1897–1960), Canadian fighter ace in World War I
 
Businessmen
- William B. Harrison Jr. (born 1943), former chairman and CEO of JP Morgan Chase
 - William Henry Harrison (businessman) (1892–1956), American general and businessman
 - William Welsh Harrison (1850–1927), American businessman
 - William Harrison (businessman) (born 1986), Texas businessman
 
Writers
- William Harrison (antiquary) (1802–1884), English antiquarian writer on the history of the Isle of Man
 - William Harrison (author) (1933–2013), author of "Roller Ball Murder" and the screenplay for Rollerball
 - William Harrison (poet) (1685–1713), English poet and diplomat
 
Other
- William Harrison (instrument maker) (1728–1815), son of John Harrison, inventor of the chronometer
 - William Harrison (physician) (1935–2010), American obstetrician
 - William Harrison (singer) (1813–1868), English tenor and opera impresario
 - William B. Harrison (Alamo defender) (1811–1836), Texas soldier
 - William Harrison (vegetarian), English industrialist, activist, and writer
 - William Greer Harrison (1836–1916), member of the Committee of Fifty after the 1906 San Francisco earthquake
 - William Jerome Harrison (1845–1908), British geologist, science writer, and amateur photographer
 - William Henry Harrison (architect) (1897–1988), American architect in California
 - "Victim" of a 1660 murder found alive two years later; see The Campden Wonder
 - Grancer Harrison (1789–1860), plantation owner whose alleged ghost has been the subject of several stories
 - Will Harrison (actor) (born 1996), American actor