The Castle of Montearagón was a fortress-monastery in Quicena, near Huesca, Aragon, Spain, built in the Romanesque style. It is now in ruins.
In 1094 Sancho Ramirez reinforced the castle to help with the siege of the Muslim stronghold of Wasqah (Huesca); here he met his death by a stray arrow as he was reconnoitering the city's walls. The city was conquered in 1096 by Peter I of Aragon, after defeating the relief forces in the Battle of Alcoraz.
List of abbots
- 1089–1097: Simón
- 1097–1118: Ximeno
- 1119–1169: Fortún
- 1170–1204: Berenguer
- 1204–1204: Frontancio
- 1205–1249: Fernando de Aragón
- 1252–1258: Sancho de Orradre
- 1258–1284: Joan Garcés de Oris
- 1284–1306: Ximeno Pérez de Gurrea
- 1306–1317: Pero López de Luna
- 1317–1320: Juan de Aragón
- 1320–1323: Ramón de Aviñón
- 1323–1327: Bernat de la Avellana
- 1327–1353: Ximeno López de Gurrea
- 1353–1359: Pero López Lope de Gurrea
- 1359–1391: Ramón de Sellan
- 1391–1395: Mafiano d'Alaman
- 1395–1420: Juan Martínez de Murillo
- 1420–1445: Sanxo de Murillo
- 1445–1462: Carlos d'Urries
- 1462–1464: Pedro Santangel
- 1464–1473: Juan de Aragón
- 1473–1490: Juan de Revolledo
- 1492–1520: Alonso de Aragón
- 1520–1527: Alonso de So, Castro y Pinós
- 1528–1532: Pedro Jordan de Urriés
- 1532–1534: Juan de Quintana
- 1536–1546: Juan de Urrea
- 1547–1552: Alonso de Aragón
- 1554–1572: Pedro de Luna
- 1573–1574: Pedro Vitales
- 1587–1598: Marco Antonio Reves
- 1600–1614: Juan López
- 1615–1630: Martín Carrillo
- 1631–1648: Jaime Ximenez de Ayerve
- 1648–1662: Francisco Rodrigo
- 1662–1665: Pantaleón Palacio y Villacampa
- 1666–1678: Felipe Pomar y Cerdan
- 1680–1708: Joseph Panzano
- 1712–1731: Pedro Cayetano Nolibós
- 1732–1746: Francisco Gamboa y Tamayo
- 1747–1764: Francisco Herrero
- 1765–1791: Miguel Asin
- 1792–1814: Joseph Castillón
- 1815-1837: Juan María González