William Harcourt

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