William Jack

William Jack is the name of:


 * William Jack (athlete) (born 1930), British Olympic sprinter
 * William Jack (Australian explorer) (died 1910), founder of Herberton, Queensland
 * William Jack (Australian politician) (1892–1982)
 * William Jack (botanist) (1795–1822), of Scotland
 * William Jack (mathematician) (1834–1924), from Scotland
 * William Jack (U.S. politician) (1788–1852), member of the U.S. House of Representatives
 * William Brydone Jack (1817–1886), Canadian mathematician and astronomer
 * William Houston Jack (1806–1844), Republic of Texas congressman and soldier