[6][7] The Porto Metropolitan Area is a major economic engine in Portugal, with a very high HDI (Human Development Index) and a GDP above the European average.

The original Metropolitan Area of Porto was constituted by nine municipalities: Porto (the capital), Espinho, Gondomar, Maia, Matosinhos, Póvoa de Varzim, Vila Nova de Gaia, Valongo, and Vila do Conde.

[8] The urban-metropolitan agglomeration known as Porto Metropolitan Arch is a regional urban system of polycentric nature that encompasses the Porto Metropolitan Area and the sub-regions of Cávado, Ave and Tâmega e Sousa, including cities such as Braga and Guimarães.

The Porto/ Francisco de Sá Carneiro Airport / Pedras Rubras (OPO), between the municipalities of Maia, Matosinhos, and Vila do Conde, is also one of its greater investments.

The JMP is also trying to pressure the government to add a TGV line to link Vigo in Galicia to Porto Airport in order to make Porto the air traffic centre of the North-Western Iberian Peninsula and to tighten its historical ties with that Spanish province.