Fernando Ruiz de Castro (disambiguation)

Fernando Ruiz de Castro (died 1377) was a Galician nobleman.

Fernando Ruiz de Castro or the variation Fernando Rodríguez de Castro may also refer to:
 * Fernando Rodríguez de Castro (1125–1185), Castilian nobleman
 * Fernando Rodríguez de Castro (died 1304), Galician nobleman
 * Fernando Ruiz de Castro y Portugal (1505–1575), mayordomo mayor
 * Fernando Ruiz de Castro Andrade y Portugal (1548–1601), viceroy of Naples