William Douglass

William Douglass may refer to:


 * William Douglass (abolitionist) (1804–1862), American abolitionist and church community leader
 * William Douglass (engineer, born 1831) (1831–1923), engineer-in-chief for Trinity House and later for the Commissioners of Irish Lights
 * William Douglass (engineer) (1857–1913), Chief Engineer for the Commissioners of Irish Lights
 * William Douglass (physician) (1691–1752), physician and pamphleteer in Boston
 * Bill Douglass (1923–1994), American jazz drummer
 * Klondike Douglass (William Bingham Douglass, 1872–1953), American Major League Baseball player
 * William Boone Douglass, lawyer, engineer, surveyor and genealogist