Sant Andreu is one of the ten districts into which Barcelona has been divided up since 1984.
Its size is 653 ha. (third district in size) and it had 142,598 inhabitants in 2005. It is in the northern part of the city, bordering the river Besòs, two adjacent towns in the metropolitan area, Sant Adrià de Besòs and Santa Coloma de Gramenet, and three other districts of Barcelona: Nou Barris, Horta-Guinardó and Sant Martí.