Corroios is a Portuguese town and parish, located in the municipality of Seixal. It has a 2001 population of 46,475 inhabitants and a total area of 16.92 km² and the density is 2,746.9/km². Corroios remains as the second most populous town in Portugal, after Algueirão-Mem Martins (note: this ranking includes only vilas [towns] and excludes cidades [cities]). The town is located on the south side of the Tagus River. This river has on the other side Lisbon, the capital of Portugal. Corroios has several neighborhoods like Vale de Milhaços, Alto do Moinho, Santa Marta do Pinhal, Miratejo, Pinhal de Vidal and Verdizela. Corroios has a lot of immigrants, mainly from Africa but also from Eastern Europe and Asia and one third of the population is below the age of 25 years old.