Castil

Castil may refer to:


 * Castil de Peones, municipality located in the province of Burgos, Castile and León, Spain
 * Castil de Vela, municipality located in the province of Palencia, Castile and León, Spain
 * Castil-Blaze, known as Castil-Blaze (1784–1857), French musicologist, music critic, composer, and music editor