Arenys de Mar is one of the main municipalities of the comarca of Maresme, Barcelona Province, Catalonia, Spain. It is situated on the coast between Caldes d'Estrac and Canet de Mar, about 40 kilometres northeast of Barcelona. As of 2022, it had a population of 16,155. Arenys' harbour was for many years the only existing port on the north coast of Barcelona. The beaches, framed by hills which run right down to the sea, give a view of the neighbouring Costa Brava.