Uncastillo (Aragonese: Uncastiello) is a municipality in the province of Zaragoza, Aragon, eastern Spain. At the 2010 census,^[2] it had a population of 781.

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Quick Facts Country, Autonomous community ...

Uncastillo
Flag Seal
Uncastillo
Coordinates: 42°22′N 1°08′W
Country	Spain
Autonomous community	Aragon
Province	Zaragoza
Comarca	Cinco Villas
Government
• Mayor	Gemma de Uña
Area
• Total	231 km2 (89 sq mi)
Population  (2018)[1]
• Total	650
• Density	2.8/km2 (7.3/sq mi)
Demonym	Uncastilleros
Time zone	UTC+1 (CET)
• Summer (DST)	UTC+2 (CEST)

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Along with Sos d'o Rei Catolico, Exeya d'os Caballers, Sádaba and Tauste, Uncastillo is one of the five towns comprising the comarca of Cinco Villas.

In 1966 Uncastillo was declared a Conjunto Histórico-Artístico. It has several Romanesque buildings, including the parish churches of St. Martin and Santa Maria, and the churches of San Felices, San Andrés and San Juan. Its other landmarks include the castle and palace of Peter IV (14th century).

• Morlaas, France

• Cinco Villas
• List of municipalities in Zaragoza