William Harcourt may refer to: William Vernon Harcourt (scientist) (1789–1871), British scientist William Harcourt (politician) (1827–1904), British Liberal politician William Harcourt (martyr), Catholic martyr, victim of the Titus Oates plot William Harcourt, villain in the film Alien Nation (named for the people above) William Harcourt, 3rd Earl Harcourt, English nobleman and soldier William Harcourt (MP for Berkshire), in 1491, MP for Berkshire (UK Parliament constituency) William Harcourt, 2nd Viscount Harcourt
See also Willie Harcourt-Cooze, entrepreneur and chocolatier