El Masnou is a town in Catalonia, Spain. It is situated on the coast between Mongat and Premià de Mar, to the north-east of the city of Barcelona, in the county of el Maresme. The town is both a tourist centre and a (somewhat exclusive) dormitory town for Barcelona.

The town center has buildings in a wide range of styles: neoclassical, modernist, and simply eclectic. The municipal museum has collections of archeology and of Catalan ceramics, and there is also a private museum of pharmacy and medicine. A Roman village called Cal Ros de les Cabres was one of the first settlements located on the site of the current town.