'''Castrillo''' may refer to:
;People
* Carlos Castrillo (born 1985), football player * Demetrio Alonso Castrillo (1841–1916), politician and lawyer * Eduardo Castrillo (born 1942), sculptor * Lourdes Castrillo Brillantes, author * Roberto Castrillo (1941–2026), Cuban Olympic sport shooter
;Places
* Castrillo de Cabrera * Castrillo de Don Juan * Castrillo de Onielo * Castrillo de Riopisuerga * Castrillo de Villavega * Castrillo de la Guareña * Castrillo de la Reina * Castrillo de la Valduerna * Castrillo de la Vega * Castrillo del Val * Castrillo Mota de Judíos
==See also==
{{disamb|geo|surname}}