William Norris may refer to:
William Norris (antiquarian) (1719–1791), English clergyman and antiquarian
William Norris (CEO) (1911–2006), CEO of Control Data Corporation
William Norris (locomotive builder) (1802–1867), American steam locomotive builder
Sir William Norris (judge) (d. 1859), Chief Justice of British Ceylon, father of William Edward Norris
William Edward Norris (1847–1925), British author
William Norris (Confederate signal officer) (1820–1896)
William H. Norris (1800–1893), American military officer and politician who founded the city of Americana in Brazil
Sir William Norris, 1st Baronet (c. 1658–1702), Member of Parliament for Liverpool, England
William Albert Norris (b. 1927), former judge for the United States Court of Appeals for the Ninth Circuit
William Norris III (1936-2016), American judge
William Norreys, also often spelt Norris (1433–1507), Lancastrian soldier during the War of the Roses
William Norreys (gentleman usher), Gentleman Usher of the Black Rod and Order of the Garter; Member of Parliament for Windsor
William Norris (1501–68), Member of Parliament for Liverpool
William Norreys (captain) (c.1552–1579), soldier and Member of Parliament for Berkshire