The Viana do Castelo District (Portuguese: Distrito de Viana do Castelo [viˈɐnɐ ðu kɐʃˈtɛlu] ) is a district located in the northwest of Portugal, bordered on the north by Spain (Galicia) and on the south by Braga District. It has an area of 2,255 km (871 sq mi) and a population of 252,011 (2006), for a density of 111.8 inhabitants/km. The district capital is the city of Viana do Castelo.

The district is composed of ten municipalities:

• Arcos de Valdevez Municipality
• Caminha Municipality
• Melgaço Municipality
• Monção Municipality
• Paredes de Coura Municipality
• Ponte da Barca Municipality
• Ponte de Lima Municipality
• Valença Municipality
• Viana do Castelo Municipality
• Vila Nova de Cerveira Municipality

Member	Party
Anabela Rodrigues	PS
Eduardo Teixeira	PSD
Emília Cerqueira	PSD
Jorge Salgueiro Mendes	PSD
José Manuel Carpinteira	PS
Marina Gonçalves	PS

Summary of election results from Viana do Castelo district, 1976-2022

Parties	%	S	%	S	%	S	%	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		2015		2019		2022
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	29.8	2	34.8	3	42.1	3
PSD	32.8	3	In AD				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	In PàF		33.8	3	34.2	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			6.2		3.4
AD			54.8	4	59.2	5
PRD									16.2	1	4.8
PàF																											45.5	4
Total seats	7		6
Source: Comissão Nacional de Eleições

41°41′42″N 8°49′48″W / 41.69500°N 8.83000°W / 41.69500; -8.83000