Baixo Vouga is a Portuguese subregion integrated in the Centro Region. It is centered on the city of Aveiro. Other major cities include Águeda, Ílhavo and Ovar. The subregion covers an area of 1,807 km² and has a population of 394,393 inhabitants (2005) for an overall density of 218 hab/km². It is crossed from east to west by the Vouga River.