Sant Adrià de Besòs (Catalan pronunciation: [ˈsant əðɾiˈa ðə βəˈzɔs]) is a city and a municipality within the comarca of Barcelonès in Catalonia, north-eastern Spain.

[6] Historically, it has experienced several massive migration flows attracted by the important industrialisation of the area during the last century and has been subject of various major urban redevelopments.

Saint Olegarius (San José María de Porcioles) came to this priory from 1095 to 1108 before becoming the bishop of Barcelona and, later, the archbishop of Tarragona.

Surrounding this church, upon a small hill fourteen metres high, to the west of the River Besòs, is the nucleus of the original village.

The city has always been an economically unprivileged town and a really dense area, and it remained indifferent to the establishment and the improvement of public transport around Barcelona for many years, but the recent development in public infrastructures and urban renewals has brought substantial transport improvement, especially in the form of tram services.