William Dunn

William, Willie or Billy Dunn may refer to:

Politics

 * Sir William Dunn, 1st Baronet, of Lakenheath (1833–1912), banker and Liberal MP for Paisley
 * Sir William Dunn, 1st Baronet, of Clitheroe (1856–1926), British Conservative politician
 * William Dunn (South Australian politician) (1841–1891)
 * William E. Dunn (born 1926), mayor of Murray, Utah
 * William McKee Dunn (1814–1887), U.S. Representative from Indiana

Sports

 * William Dunn (bobsleigh) (born 1949), Canadian Olympic bobsledder
 * William Dunn (footballer, born 1877) (1877–?), English footballer, played for Manchester United
 * William Thomas Dunn (1881–1962), American football player for Penn State
 * Willie Dunn (golfer) (died 1952), English golfer and golf course designer
 * Willie Dunn Sr. (1821–1878), Scottish golfer
 * Billy Dunn (footballer, born 1865) (1865–1921), Scottish footballer with Stoke and other clubs
 * Billy Dunn (footballer, born 1910) (1910–1980), Scottish footballer with Celtic, Brentford, Southampton
 * Billy Dunn (footballer, born 1920) (1920–1982), English footballer with Darlington

Other

 * William Dunn (industrialist) (1770–1849), Scottish agriculturist, mechanic, and mill owner
 * William Dunn (Medal of Honor) (1834–1902), American Civil War sailor
 * William Dunn (physician) (c. 1550–1607), president of Royal College of Physicians, see Lumleian Lectures
 * William Arthur Dunn (1875–1947), Methodist clergyman in South Australia
 * William Ellsworth Dunn (1861–1925), city attorney of Los Angeles, California
 * William N. Dunn, American professor of international relations at the University of Pittsburgh
 * William R. Dunn (actor) (1888–1946), American film actor and writer
 * William R. Dunn (aviator) (1916–1995), American World War II fighter pilot
 * Sir William Dunn Professor of Biochemistry, chair at the University of Cambridge (created 1914)
 * Willie Dunn (1942–2013), Canadian singer-songwriter, film director, and politician