William Caldwell

William Caldwell may refer to:

Military

• William Caldwell (ranger) (c. 1750–1822), Irish-Canadian soldier in the American Revolution and War of 1812
• William B. Caldwell III (1925–2013), U.S. Army general
• William B. Caldwell IV (born 1954), U.S. Army general, son of William B. Caldwell III

Law

• William W. Caldwell (1925–2019), U.S. federal judge
• William B. Caldwell (judge) (1808–1876), American judge

Politics

• Billy Caldwell (1782–1841), Potawatomi leader
• William Caldwell (Halifax mayor), former mayor of Halifax, Nova Scotia
• William Caldwell (Wisconsin politician), member of the 1st Wisconsin legislature of 1848
• William Bletterman Caldwell (1798–1892), governor of the Red River Settlement
• William Clyde Caldwell (1843–1905), Ontario businessman and politician
• William Murray Caldwell (1832–1870), New Brunswick businessman and political figure
• William Parker Caldwell (1832–1903), member of the United States House of Representatives

Sports

• Bill Caldwell (racing driver), New Zealand racing driver in 1966 Tasman Series
• William Caldwell (cricketer) (1878–1964), English cricketer
• Will Caldwell (born 1982), Australian rugby union player

Others

• Acer campestre 'William Caldwell', field maple cultivar named for eponymous nurseryman
• William Caldwell (hymnist) (1801–1857), who compiled a hymn and tune book Union Harmony
• William A. Caldwell (1906–1986), American journalist and columnist
• William Hay Caldwell (1859–1941), Scottish embryologist