A region comprising the southern half of the district of Lisbon and the northern half of Setúbal, and is bounded on the north by the Centre region, northeast, east and south by the Alentejo, and the south and west by the Atlantic Ocean.

But the Lisbon district consists of the following: Lezíria do Tejo, Azambuja, West, Alenquer, Arruda dos Vinhos, Cadaval, Lourinhã, Sobral, Torres Vedras, Greater Lisbon, Amadora, Cascais, Lisbon, and the capital of Portugal , Loures, Mafra, Odivelas, Oeiras, Sintra and Vila Franca de Xira.