Castilian or Castillian may refer to:

  • Castile, a historic region of the Iberian peninsula
  • Castilian people, an ethnic group from Castile
  • Castilian languages, a branch of the West Iberian languages consisting of all linguistic varieties descended from Old Latin
  • Spanish language, a Romance language that originated in Castile
  • Castilian Spanish, a variety of Peninsular Spanish spoken in Spain
  • Crown of Castile, a former state on the Iberian Peninsula
  • Kingdom of Castile, a former kingdom on the Iberian Peninsula
  • Castile and León, an autonomous community of Spain
  • Castile–La Mancha, an autonomous community of Spain
  • SS Castilian, steamer ships
  • The Castilian, a 1963 film
  • Castilian War, a war between several sultanates and the Spanish Empire.

See also

  • Castile (disambiguation)
  • Nationalities of Spain (disambiguation)