Oeiras (pron. o'ɐiɾɐʃ) is a civil parish and a municipality in western Lisbon Metropolitan Area. It is in conurbation with Lisbon, the parish population is 34,850, and the entire Oeiras municipality has 168,475 inhabitants. The town (vila) of Oeiras is one of the most populous towns in Portugal. Located by the end of the mouth Tagus river (rio Tejo), across from Almada, in the Greater Lisbon Area.