Melgaço is a municipality in the district of Viana do Castelo in Portugal. The population in 2011 was 9,213, in an area of 238.25 km2. It is the northernmost municipality in Portugal. The present Mayor is Manoel Batista, elected by the Socialist Party. The municipal holiday is Ascension Day. Melgaço is certified by the EarthCheck Sustainable Destinations program.