Diagonal Mar i el Front Marítim del Poblenou is a neighborhood in the Sant Martí district of Barcelona, Catalonia, Spain.

The area between the seafront, Sant Adrià de Besòs and the Besòs river was previously made up of slums and poor areas surrounding the neighbourhoods of La Mina, El Maresme and Poblenou.

This has been criticised by renowned local architects such as Oriol Bohigas, Juli Capellas or Josep Maria Montaner or urbanism scholar Llàtzer Moix.

[1] Most renovation in the area was ready in time for the 2004 Cultural Forum, which took place in the International Convention Centre of Barcelona (CCIB).

It includes Catalunya's largest shopping center Centre Comercial Diagonal Mar,[2] as well as Parc de Diagonal Mar, designed by Enric Miralles and Benedetta Tagliabue.