William Fitch

William or Bill Fitch may refer to:
 * William Stevenson Fitch (1793–1859), English antiquarian
 * William Fitch (British Army officer) (died 1795), British soldier
 * William Edward Fitch (1867–1949), American physician, surgeon and writer
 * William H. Fitch (1929–2016), United States Marine Corps general
 * W. Tecumseh Fitch (William Tecumseh Sherman Fitch III, born 1963), American evolutionary biologist and cognitive scientist
 * Bill Fitch (1932–2022), American NBA coach
 * Bill Fitch (baseball) (fl. 1926), American baseball player
 * Benet Canfield (born William Benedict Fytch, 1562–1610), English mystic
 * Clyde Fitch (William Clyde Fitch, 1865–1909), American dramatist