The Siege of Jaén was one of many sieges on that city during the Spanish Reconquista. The siege was carried out from 24 June through September, 1230 by forces of the Kingdom of Castile commanded by Ferdinand III of Castile against the defending Taifa of Jayyān (جيان). The battle resulted in a Jayyānese victory after the Castilian withdrawal and abandonment of the siege immediately following the death of King Alfonso IX of León.