William Norris or Norreys may refer to:
Law and politics William Norris (1501–68) (1501–1568), English politician, Member of Parliament for Liverpool William Norreys (Berkshire MP) (c. 1548–1579), English politician and soldier; Member of Parliament for Berkshire Sir William Norris, 1st Baronet (c. 1658–1702), English politician, Member of Parliament for Liverpool Sir William Norris (judge) (1795–1859), English jurist, Chief Justice of British Ceylon, father of William Edward Norris William Albert Norris (1927–2017), American jurist, judge for the United States Court of Appeals for the Ninth Circuit William Norris III (1936–2016), American judge
Military William Norreys (c.1441–1507), English Lancastrian soldier during the War of the Roses William Hutchinson Norris (1800–1893), American military officer and politician who founded the city of Americana in Brazil William Norris (Confederate signal officer) (1820–1896) William C. Norris (general) (1926–2024), United States Air Force general
Other William Norris (antiquarian) (1719–1791), English clergyman and antiquarian William Norris (locomotive builder) (1802–1867), American steam locomotive builder William Norris (English cricketer) (1830–1889), English clergyman and cricketer William Edward Norris (1847–1925), British author William Foxley Norris (1859–1937), English clergyman, Dean of York William Norris (Wellington cricketer) (1908–1988), New Zealand cricketer William Norris (CEO) (1911–2006), American business executive, CEO of Control Data Corporation