The district of Viana do Castelo (Portuguese pronunciation: [viˈɐnɐ ðu kɐʃˈtɛlu], Portuguese: Distrito de Viana do Castelo) is a district located in the northwest of Portugal, bordered by Spain from the north and Braga District from the south. It has an area of 2,255 km² and a population of 252,011 (2006), for a density of 111.8 inhabitants/km². The district capital is the city of Viana do Castelo.
The district is composed of 10 municipalities:
