Castilian

Castilian or Castillian may refer to:


 * Castile, a historic region of 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
 * 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, a 1919 British ship
 * The Castilian, a 1963 film
 * Castilian War, a war between several sultanates and the Spanish Empire.