Viana do Castelo District
      
The Viana do Castelo District (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.
Municipalities
The district is composed of 10 municipalities:
Summary of votes and seats won 1976-2011
Summary of election results from Viana do Castelo district, 1976-2011
  
| Parties | % | S | % | S | % | S | % | S | % | S | % | S | % | S | % | S | % | S | % | S | % | S | % | S | % | S | 
| 1976 | 1979 | 1980 | 1983 | 1985 | 1987 | 1991 | 1995 | 1999 | 2002 | 2005 | 2009 | 2011 | 
| PS | 25.5 | 2 | 24.9 | 2 | 22.8 | 1 | 32.5 | 2 | 18.4 | 1 | 20.3 | 1 | 25.2 | 2 | 38.8 | 3 | 40.2 | 3 | 35.3 | 3 | 42.0 | 3 | 36.3 | 3 | 26.2 | 2 | 
| PSD | 32.8 | 3 |  |  |  |  | 32.6 | 3 | 33.5 | 3 | 54.5 | 5 | 56.9 | 4 | 42.1 | 3 | 35.8 | 2 | 45.5 | 3 | 33.5 | 2 | 31.3 | 2 | 43.6 | 3 | 
| CDS-PP | 23.5 | 2 |  |  |  |  | 18.4 | 1 | 16.6 | 1 | 7.7 |  | 7.2 |  | 11.3 |  | 14.0 | 1 | 10.3 |  | 11.4 | 1 | 13.6 | 1 | 13.4 | 1 | 
| PCP/APU/CDU | 6.6 |  | 9.8 |  | 10.0 |  | 9.9 |  | 8.2 |  | 6.3 |  | 5.0 |  | 4.6 |  | 5.0 |  | 3.5 |  | 3.8 |  | 4.2 |  | 4.9 |  | 
| BE |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1.2 |  | 1.8 |  | 4.5 |  | 8.6 |  | 4.4 |  | 
| AD |  |  | 54.8 | 4 | 59.2 | 5 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| PRD |  |  |  |  |  |  |  |  | 16.2 | 1 | 4.8 |  | 1.1 |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| Source: Comissão Nacional de Eleições | 
Coordinates: 41°41′42″N 8°49′48″W / 41.69500°N 8.83000°W / 41.69500; -8.83000