Sant Andreu de Llavaneres is a municipality located 36 km north of Barcelona (Catalonia) (Spain), along the Mediterranean coast, between Mataró and Sant Vicenç de Montalt. It belongs to the Maresme comarca and the Barcelona province. The short name is simply Llavaneres.

Mataró is the capital and largest town of the Maresme county in Catalonia (Spain). It is located on the Maresme coast, to the south of Costa Brava, between Cabrera de Mar and Sant Andreu de Llavaneres, 30 kilometres north-east of Barcelona. As of 2021, it had a population of c. 129,749 inhabitants.