William Small (disambiguation)

William Small (1734–1775) was a professor of natural philosophy, College of William and Mary in Virginia.

William Small may also refer to:
 * William Small (Wisconsin politician) (1824–1900), Scottish-born Wisconsin politician
 * William Small (artist) (1843–1929), Scottish artist
 * William Small (basketball), American basketball coach
 * William Small (Scottish politician) (1909–1978), Scottish Labour Party politician
 * William Small (trade unionist) (1845–1903), Scottish trade unionist
 * William B. Small (trade unionist) (1872–1944), his son, Scottish trade unionist
 * William B. Small (politician) (1817–1878), U.S. Representative from New Hampshire
 * William N. Small (1927–2016), U.S. Navy admiral
 * William J. Small (1926–2020), American television executive