William Allen
William Allen may refer to:
Politicians and government officials
United States
- William Allen (burgess, 1629), British indentured servant who later served in the Virginia House of Burgesses
- William Allen (burgess, 1758–1761), Virginia planter, patriot and burgess from Surry County father of William Allen (Claremont)
- William Allen (congressman), United States Representative from Ohio
- William Allen (governor), U.S. Representative, Senator, and 31st Governor of Ohio
- William Allen (loyalist), wealthy merchant, chief justice of Pennsylvania's provincial Supreme Court, and founder of Allentown, Pennsylvania
- William Allen (Montana politician), member of the Montana House of Representatives and lieutenant governor
- William C. Allen (politician), American businessman and politician in Wisconsin
- William F. Allen (Delaware politician), American businessman and politician
- William F. Allen (New York politician), American judge and politician
- William Fessenden Allen, American businessman and royal advisor in the Kingdom of Hawaii
- William H. Allen (politician), member of the Mississippi House of Representatives in the 1880s
- William J. Allen, congressman from Illinois and federal judge
- William P. Allen (politician), member of the Wisconsin State Assembly
- William Reynolds Allen, justice of the North Carolina Supreme Court
- William S. Allen, Iowa Secretary of State, 1913–1918
- William V. Allen, U.S. Senator from Nebraska
- William W. Allen (politician), member of the Pennsylvania House of Representatives
- William Allen (Massachusetts judge), Justice of the Massachusetts Supreme Judicial Court
Other
- William Allen (National Liberal politician), British politician
- William Allen (Armagh MP), Northern Irish unionist politician
- William Allen (Canadian politician), from Toronto
- William Bell Allen, Australian politician from New South Wales
- William C. Allen, Bahamanian politician and banker
- William Edward David Allen, British politician and historian
- William Johnston Allen, Australian politician from New South Wales
- William Shepherd Allen, 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), English actor in the Caroline era
- William Allen (biographer), American evangelical Congregationalist
- William Allen (Utah architect), American architect in Utah
- William H. Allen (architect), architect of New Haven, Connecticut
- William Henry Allen (artist), British artist and printmaker active in New Zealand from 1925 to the 1940s
- William Allen, American architect in California; co-designer of Burbank City Hall
- William B. Allen, American political scientist
- William Francis Allen, American classical scholar
- William Henry Allen (academician), American professor
- W. H. Allen (artist), English landscape watercolour artist
- William Rodney Allen, American author and professor of English
- William Sheridan Allen, American author and historian
- W. Sidney Allen, English linguist and philologist
- William T. Allen, professor of corporate law at New York University law school
Military personnel
- William Allen (Royal Navy officer), English naval officer and explorer
- William Allen (soldier), American recipient of Medal of Honor
- William Allen (VC 1879), English recipient of the Victoria Cross
- William Barnsley Allen, English recipient of the Victoria Cross
- William Henry Allen, American naval officer
- William Howard Allen, American naval officer
- William W. Allen (general), Confederate general
Scientists
- William Allan (geneticist), American physician and geneticist
- William Allen (English Quaker), English Quaker, scientist and philanthropist
- William Douglas Allen, British/Australian physicist and electrical engineer
- William Henry Allen (engineer),, British engineer
Sports people
- William Allen (sailor), American sailor and Olympic champion
- William Reginald Allen (English cricketer), English cricketer
- William L. Allen, American football player and coach
- William D. Allen, American football and basketball coach
Clergy and philanthropists
- William Allen (cardinal), English Roman Catholic cardinal priest
- William Allen (English Quaker), English Quaker, scientist and philanthropist
- William Allen (Quaker minister), American Quaker minister, also active in Canada
- William Allen (philanthropist), public benefactor in South Australia
- William Allen (Congregationalist), clergyman, composer and poet in Victoria, Australia
Others
- William Allen (banker), English banker
- William E. Allen, director of the U.S. Bureau of Investigation
- William G. Allen, American professor and abolitionist
- William McPherson Allen, American aircraft businessman and President of Boeing
- William (Orgain) Allen, American landowner and financier from Virginia
- William P. Allen (trade unionist), British trade unionist
- William R. Allen (economist), American economist, professor and author