Vallès Oriental in the context of Àmbit metropolità de Barcelona

Granollers (Catalan: [ɡɾənuˈʎes]; Spanish: [ɡɾanoˈʝers] ) is a city in central Catalonia, about 30 kilometres north-east of Barcelona. It is the capital and most densely populated city in the comarca of Vallès Oriental.

Granollers is now a bustling business centre, having grown from a town dominated by Catalonia's textile industry that was prominent during the 19th century. However, in the southern portion of the municipality, the Palou area retains the agricultural characteristics of the past.

Mollet del Vallès (Catalan pronunciation: [muˈʎɛd dəl βəˈʎɛs]) is a municipality in the comarca of the Vallès Oriental in Catalonia, Spain. It is situated in the valley of the Besòs river, and is an important communications hub from Barcelona towards the north: the AP-7 Motorway passes through the municipality, as do the Renfe railway lines to Vic and Puigcerdà and to Girona and Portbou. The town is also served by the C-17 highway (formerly N-152).

Mollet del Vallès has a number of buildings in the modernista and noucentista styles. The studio-museum of the painter Abelló displays modern Catalan art.

Canovelles (Catalan pronunciation: [kənuˈβeʎəs]) is a municipality situated in the comarca of Vallès Oriental, in the province of Barcelona, part of the autonomous community of Catalonia in northeastern Spain. It is located about 2 km (1.2 mi) from the local capital of Granollers, with which it forms a conurbation.

Montmeló (Catalan pronunciation: [ˌmomːəˈlo]) is a municipality in the comarca of Vallès Oriental, within the Barcelona metropolitan area, in Catalonia, Spain. It contains the Circuit de Barcelona-Catalunya, which is the home of the Formula One Barcelona-Catalunya Grand Prix, and was the home of the Spanish Grand Prix until 2025, and the home of MotoGP Catalan Grand Prix.

El Vallès (Catalan pronunciation: [əl bəˈʎɛs], or simply Vallès) is a historical county in Catalonia, Spain, located in the center of the Catalan Pre-Coastal Range. It is nowadays represented by two separate administrative divisions (comarques) which are part of the Barcelona Province: the Western Vallès, which has two capitals, Sabadell and Terrassa; and the Eastern Vallès, with Granollers as its capital.

The present division of Vallès has its historical roots in the legal districts of Granollers and Terrassa, established in 1834. However, the first time this subdivision was explicitly used as sanctioned by law was in 1936, with the official division of Catalonia in comarques. In 2015, four of the municipalities in Eastern Vallès became part of a newly created comarca: the Moianès. Some parts of the Vallès region belong to the metropolitan area of Barcelona and the Àmbit Metropolità de Barcelona(metropolitan region of Barcelona), and is nowadays connected with Barcelona with public transportations systems such as FGC's so-called Metro del Vallès.