Comarcas of Aragon in the context of Bajo Aragón-Caspe

Somontano de Barbastro (Aragonese: Semontano de Balbastro) is a comarca in Province of Huesca, Aragon, Spain.

Somontano borders the comarcas of Sobrarbe and Alto Gállego to the north, Ribagorza and La Litera to the east, Cinca Medio to the southwest, the Monegros desert to the south and Hoya de Huesca to the west.

La Jacetania (Aragonese: A Chacetania; French: Jacétanie) is a comarca in northern Aragon, Spain. It is located in the northwestern corner of the Huesca and Zaragoza provinces. The administrative capital is Jaca, which with a population of 13,374 is the largest town in the comarca. The area is famous for its ski resorts.

Jacetania is bordered by France to the north and Navarre to the west. Most of its territory is mountainous, with the ranges of the Pyrenees and Pre-Pyrenees covering most of its area. The name of the comarca originates in the ancient Iberian tribe of the Iacetani (Latin: Iaccetani).

Alto Gállego (Aragonese: Alto Galligo) is a comarca located in the north of the autonomous community of Aragón, Spain. It occupies practically the entirety of the upper basin of the Río Gállego.

Historically the comarca was a part of the area known as Jacetania, the original nucleus of the old county of Aragón. The historical territories integrated into that area were the Tena Valley, the lands surrounding Biescas, and the Serrablo.

Sobrarbe is a comarca of Aragon, Spain. It is located in the north of Huesca province, making up part of the autonomous community of Aragon. Many of its people speak the Aragonese language locally known as fabla.

Sobrarbe is a mountainous region with some of the highest peaks in the Pyrenees, extending from the heights of the Axial Pyrenees in the north on the border with France, to the external Pyrenean mountain ranges in the south which separate it from the Aragonese mountains.

Ribagorza (Spanish: [riβaˈɣoɾθa], Aragonese: [ɾiβaˈɣoɾθa]) or Ribagorça (Western Catalan: [riβaˈɣɔɾsa]; French: Ribagorce) is a comarca (administrative subdivision) in Aragon, Spain, situated in the north-east of the province of Huesca. It borders the French département of the Haute-Garonne to the north and Catalonia (the comarques of Val d'Aran, Alta Ribagorça, Pallars Jussà, and Noguera) to the east. Within Aragon its neighboring comarcas are Sobrarbe, Somontano de Barbastro, and La Litera. It roughly corresponds to the Aragonese part of the medieval County of Ribagorza. The administrative capital of Ribagorza is Graus, although the historical capital of the county was at Benabarre.

The Ribagorçan dialect is a transitional Aragonese–Catalan dialect spoken in the western part of the comarca. Municipalities in the eastern part, bordering Catalonia, are part of La Franja, a geolinguistic area, where the local language is a variety of Catalan. However, Aragonese and Catalan form a dialect continuum here and the geographical limit of both languages cannot be drawn in a clear-cut manner.

Benasque (Spanish: [beˈnaske]; in Benasquese dialect: Benás; Aragonese: Benás) (locally [beˈnas]) is a town in the comarca of Ribagorza, province of Huesca, Spain. It is the main town in the Benasque Valley, located in the heart of the Pyrenees and surrounded by the highest peaks in that range.

Montes Universales is a 32 km (20 mi) long mountain range in the southeastern end of the Iberian System. Its highest point is the 1,935 m high summit known as Caimodorro. The 1,830 m high Muela de San Juan is another important peak.

Administratively, the Montes Universales belong to the Sierra de Albarracín comarca of Aragon, therefore they are often confused with the geographical Sierra de Albarracín mountain range.

La Litera (Spanish: [la liˈteɾa]) or La Llitera (Catalan: [la ʎiˈteɾa]) (Aragonese: A Litera) is an Aragonese comarca in the south-east of the province of Huesca.

Its cultural capital is Tamarite de Litera, its administrative capital is Binefar and it borders the comarques of Ribagorza, Somontano de Barbastro, Cinca Medio, Bajo Cinca in Aragon and Noguera and Segrià in Catalonia.

Bajo Cinca (Spanish: [ˈbaxo ˈθiŋka]) or Baix Cinca (Catalan: [ˈbaʃ ˈsiŋka]; Aragonese: Cinca Baxa, [ˈθiŋka ˈβajʃa]) is a comarca in eastern Aragon, Spain. It is named after river Cinca.

This comarca is located in the southeastern corner of the Huesca province.The administrative capital is Fraga, with 13,592 inhabitants the largest town of the comarca.