Barcelonès in the context of Sant Adrià de Besòs

The comarques of Catalonia (singular comarca, Eastern Catalan: [kuˈmarkə], Western Catalan: [koˈmaɾka]), often referred to in English as counties, are an administrative division of Catalonia. Each comarca comprises a number of municipalities, roughly equivalent to a county in the United States. Currently, Catalonia is divided into 42 comarques and Aran, considered a "unique territorial entity" and not a comarca.

Each comarca has a representative county council (Catalan: consell comarcal), except for Barcelonès, which abolished it in 2019, and Aran, which instead has the Conselh Generau d'Aran.

L'Hospitalet de Llobregat (Catalan pronunciation: [luspitəˈlɛd də ʎuβɾəˈɣat; ˌlɔs-]; Spanish: Hospitalet de Llobregat), often shortened to L'Hospitalet or just L'H, is a city and municipality in the autonomous community of Catalonia in Spain. It is part of the Barcelona metropolitan area, the Barcelona province, the Barcelonès comarca and of the Barcelona conurbation. With a population of 282,299 as of 2024, it is the 15th-largest city in Spain and the 2nd-largest city in Catalonia.

By population, it is the second largest municipality in Catalonia and the sixteenth in Spain. It is one of the most densely populated cities in the European Union.

Santa Coloma de Gramenet (Catalan: [ˈsantə kuˈlomə ðə ɣɾəməˈnɛt]; Spanish: Santa Coloma de Gramanet, no longer official), informally simply known as Santa Coloma, and formerly as Gramenet de Besòs (Spanish: Gramanet del Besós) between 1936 and 1939, is a municipality in Barcelonès county, in Catalonia, Spain. It is situated on the south-east side of the coastal range, with the Puig Castellar (299 m) as its highest point, on the left bank of the Besòs river: the municipalities of Sant Adrià de Besòs and Badalona separate it from the coast. It is the ninth most populated city in Catalonia.

The area has been inhabited since at least the Iberic period, and the remains of an Iberic village have been found on Puig Castellar. The artefacts are housed in a museum in La Torre Balldovina, a building dating from the 18th century.Other notable buildings include the renaissance palace of La Torre Pallaresa and the noucentistaClínica Mental.