William Allen may refer to:
Politicians and government officials
United States William Allen (burgess, 1629) (c. 1600–c. 1630), British indentured servant who later served in the Virginia House of Burgesses William Allen (burgess, 1758–1761) (1634–1793), Virginia planter, patriot and burgess from Surry County William Allen (Claremont) 1768–1831), his son, Virginia planter, politician and militia officer William Allen (congressman) (1827–1881), United States representative from Ohio William Allen (governor) (1803–1879), U.S. representative, senator, and governor of Ohio William Allen (loyalist) (1704–1780), merchant, chief justice of Pennsylvania's provincial Supreme Court, and founder of Allentown, Pennsylvania William Allen (Montana politician) (1871–1953), member of the Montana House of Representatives and lieutenant governor William C. Allen (Wisconsin politician) (1814–1887), American businessman and politician in Wisconsin William F. Allen (Delaware politician) (1883–1946), American businessman and politician William F. Allen (New York politician) (1808–1878), American judge and politician William Fessenden Allen (1831–1906), American businessman and royal advisor in the Kingdom of Hawaii William H. Allen (politician) (c. 1851–?), member of the Mississippi House of Representatives in the 1880s William J. Allen (1829–1901), congressman from Illinois and federal judge William P. Allen (politician) (1818–1901), member of the Wisconsin State Assembly William Reynolds Allen (1860–1921), justice of the North Carolina Supreme Court William S. Allen (1857–1926), Iowa secretary of state, 1913–1918 William V. Allen (1847–1924), U.S. senator from Nebraska William W. Allen (politician) (1908–1992), member of the Pennsylvania House of Representatives William Allen (Massachusetts judge) (1822–1891), justice of the Massachusetts Supreme Judicial Court William Ross Allen (1869–1942), American politician and lawyer from Virginia
Other William Allen (National Liberal politician) (1870–1945), British politician William Allen (Armagh MP) (1866–1947), Northern Irish unionist politician William Allen (Canadian politician) (1919–1985), from Toronto William Bell Allen (1812–1869), Australian politician from New South Wales William C. Allen (Bahamian politician) (1937–2021), Bahamanian politician and banker William Edward David Allen (1901–1973), British politician and historian William Johnston Allen (1835–1915), Australian politician from New South Wales William Shepherd Allen (1831–1915), English Liberal politician William Torrance Allen, Canadian politician from Ontario William John Allen, Canadian politician from Ontario
Artists, architects, writers, and scholars William Allen (actor) (died 1647), English actor in the Caroline era William Allen (California architect) (1901–1986), Jewish-American architect in southern California William Allen (biographer) (1784–1868), American evangelical Congregationalist William Allen (Utah architect) (1849–1928), American architect in Utah William H. Allen (architect) (1858–1936), architect of New Haven, Connecticut William Henry Allen (artist) (1894–1988), British artist and printmaker active in New Zealand from 1925 to the 1940s William B. Allen (born 1944), American political scientist William Francis Allen (1830–1889), American classical scholar William Henry Allen (academician) (1808–1882), American professor W. H. Allen (artist) (William Herbert Allen, 1863–1943), English landscape watercolour artist William Rodney Allen, American author and professor of English William Sheridan Allen (1932–2013), American author and historian W. Sidney Allen (1918–2004), English linguist and philologist William T. Allen (1944–2019), professor of corporate law at New York University law school William Cicero Allen (1859–1952), American educator, historian, and author
Military personnel William Allen (Royal Navy officer) (1792–1864), English naval officer and explorer William Allen (soldier) (1845–1882), American recipient of Medal of Honor William Allen (VC 1879) (1843–1890), English recipient of the Victoria Cross William Barnsley Allen (1892–1933), English recipient of the Victoria Cross William Henry Allen (1784–1813), American naval officer William Howard Allen (1790–1822), American naval officer William W. Allen (general) (1835–1894), Confederate general
Scientists William Allen (English Quaker) (1770–1843), English Quaker, scientist and philanthropist William Douglas Allen (1914–2008), British/Australian physicist and electrical engineer William Henry Allen (engineer), (1844–1926), British engineer
Sports people William Allen (sailor) (born 1947), American sailor and Olympic champion William Reginald Allen (English cricketer) (1893–1950), English cricketer William L. Allen (c. 1877–1907), American football player and coach William D. Allen (1886–1979), American football and basketball coach
Clergy and philanthropists William Allen (cardinal) (1532–1594), English Roman Catholic cardinal priest William Allen (English Quaker) (1770–1843), English Quaker, scientist and philanthropist William Allen (Quaker minister) (1821–1898), American Quaker minister, also active in Canada William Allen (philanthropist) (1790–1856), public benefactor in South Australia William Allen (Congregationalist) (1847–1919), clergyman, composer and poet in Victoria, Australia
Others William Allen (banker) (1736–1792), English banker William E. Allen (1880–1960), director of the U.S. Bureau of Investigation William G. Allen (1820–1888), American professor and abolitionist William McPherson Allen (1900–1985), American aircraft businessman and president of Boeing William (Orgain) Allen (1829–1875), American landowner and financier from Virginia William P. Allen (trade unionist) (1888–1958), British trade unionist William R. Allen (economist) (1924–2021), American economist, professor and author
See also Bill Allen (disambiguation) Will Allen (disambiguation) Willie Allen (disambiguation) W H Allen (disambiguation) William Allen High School, Allentown, Pennsylvania William Allan (disambiguation) William Van Alen (1883–1954), American architect