Lisbon is the capital of Portugal.
Lisbon . About 2.8 million people live in the Lisbon Metropolitan Area ( which represents approximately 27 % of the country 's population ) . Unlike most capital cities , Lisbon 's status as the capital of Portugal has never been granted or confirmed officially -- by statute or in written form . Its position as the capital has formed through constitutional convention , making its position as de facto capital a part of the Constitution of Portugal . Lisbon District ( [ liʒˈβoɐ ] , Distrito de Lisboa ) is a district located in the South Central Portugal , the district capital is the city of Lisbon , also the national capital .