Juan Castilla may refer to:
Juan de Castilla y Haro (died 1326), Spanish nobleman Juan de Castilla (1460–1520), Spanish prelate Juan Carlos Castilla (marine biologist) (born 1940), Chilean marine biologist Juan José Castilla (born 1945), Mexican heptathlete Juan Carlos Castilla (footballer) (born 1978), Spanish football goalkeeper Juan Castilla (footballer) (born 2004), Colombian football midfielder
See also Juan Castillo (disambiguation)