William Wells may refer to:

• William Wells (general) (1837–1892), U.S. Army officer and Medal of Honor recipient for the Battle of Gettysburg
• William Wells (sailor) (1832–1868), American Civil War sailor and Medal of Honor recipient
• William Wells (soldier) (1770–1812), American army officer and adopted member of the Miami tribe
• William Lewis Wells (1895–1918), World War I flying ace

• Bill Wells (born c. 1963), Scottish musician
• Dicky Wells (William Wells, 1907–1985), American jazz trombonist

• Billy Wells (American football) (William Prescott Wells, 1931–2001), American professional football player
• Bombardier Billy Wells (William Thomas Wells, 1889–1967), English heavyweight boxer
• William Wells (boxer) (1936–2008), British Olympic boxer
• Willie Wells (1906–1989), American professional baseball player
• Willie Wells Jr. (1922–1994), American professional baseball player
• Bill Wells (footballer) (1920–2013), Australian rules footballer
• Billy Wells (footballer) (1916–1984), Australian rules footballer

• William Benjamin Wells (1809–1881), Canadian lawyer, judge, journalist and politician
• William H. Wells (1769–1829), American lawyer and U.S. Senator from Delaware
• William S. Wells (1848–1916), member of the Maine House of Representatives
• William Wells (1908–1990), barrister, MP for Walsall North from 1945–74
• William Wells (New Zealand politician) (1810–1893), member of the New Zealand Parliament
• William Wells (1818–1889), British Liberal Member of Parliament

• William Wells (bishop) (died 1444), English Roman Catholic Bishop of Rochester
• William Wells (priest) (died 1675), English Church of England Archdeacon of Colchester
• William Wells (minister) (1744–1827), minister and farmer

• William Charles Wells (1757–1817), Scottish-American physician and printer
• William F. Wells (1886–1963), American scientist and sanitary engineer
• William Frederick Wells (1762–1836), English watercolour painter and etcher
• William H. Wells (educator) (1812–1865), educator who served as superintendent of Chicago Public Schools
• William Wells (whaling master) (1815–1880), English captain of whaling ships
• William George Wells (1939–2021), Chief Scout Commissioner of Scouts Australia
• William Wells (cricketer) (1881–1939), English cricketer
• William Storrs Wells (1849–1926), American businessman, prominent in New York society during the Gilded Age

• Welles (name)
• Wells (name)