Casilda \c(a)-sil-da, cas(i)-lda\ as a girl's name is of Latin origin, and the meaning of Casilda is "dwelling place". This Spanish saint's name is of uncertain meaning. Possibly Spanish from German, "warlike, a fighter", or may have been Arabic in origin. Saint Casilda (11th century) is the patron saint of Toledo.

Casilda has 1 variant form: Cassilda.

A baby name that sounds like Casilda is Giselda.