Castellar may refer to the places below or to the Castellar typeface.

France Castellar, Alpes-Maritimes, a commune in the Département of Alpes-Maritimes, Provence-Alpes-Côte d'Azur Castellare-di-Casinca, a commune in the Haute-Corse department on the island of Corsica Castellare-di-Mercurio, a commune in the Haute-Corse department of France on the island of Corsica

Italy Castellar, Piedmont, a former comune in the province of Cuneo Castellar Guidobono, a comune in the province of Alessandria, Piedmont

Spain Castellar, Aguilar de Segarra, a singular population entity in Aguilar de Segarra, Catalonia Castellar, Jaén, a municipality in the province of Jaén, Andalusia Castellar de la Frontera, a municipality in the province of Cádiz, Andalusia Castellar de la Muela, a municipality in the province of Guadalajara, Castile-La Mancha Castellar de la Ribera, a municipality in the province of Lleida, Catalonia Castellar de n'Hug, a municipality in the province of Barcelona, Catalonia Castellar de Santiago, a municipality in the province of Ciudad Real, Castile-La Mancha Castellar del Riu, a municipality in the province of Barcelona, Catalonia Castellar del Vallès, a municipality in the province of Barcelona, Catalonia El Castellar, a municipality in the province of Teruel, Aragon

See also Castelar, a city in Morón Partido, Buenos Aires Province, Argentina