Moeche Castle is a 15th-century medieval castle in the parish of San Xurxo de Moeche, Ferrol region.
Archaeological work revealed, beneath the current fortification, an earlier structure that may be the castle stormed by the Irmandiños around 1467 during the Second Irmandiño Revolt.
The castle today is the result of the subsequent reconstruction. The keep, preceded by an armoury, leads to a central courtyard connecting all the rooms: servants' quarters, armoury, dining room and stables — where the Moeche Castle Interpretation Centre now stands.
Three heraldic motifs are preserved on the main facade: the coat of arms of the Duke of Arjona and the shields of Pedro Álvarez de Osorio and his wife Beatriz de Castro.