Gielgud or Giełgud /ˈɡiːlɡʊd/ is a Polish surname, a Polinized form of the Lithuanian noble surname Gelgaudas. Notable people with the surname include:

• John Gielgud (1904–2000), English actor, director, and producer
• Lewis Gielgud (1894–1953), English scholar and intelligence officer
• Maina Gielgud (born 1945), British ballet dancer and ballet administrator
• Val Gielgud (1900–1981), English actor, writer, director and broadcaster

See also

• Gielgud Theatre, London
• 39557 Gielgud, an asteroid
• Gielgud Award
• All pages with titles containing Gielgud