Lisbon (; Portuguese: Lisboa, IPA: [liʒˈboɐ] ( listen)) is the capital and the largest city of Portugal, with an estimated population of 552,700 within its administrative limits in an area of 100.05 km². Its urban area extends beyond the city 's administrative limits with a population of around 2.7 million people, being the 11th-most populous urban area in the European Union. About 3 million people live in the Lisbon Metropolitan Area (which represents approximately 27% of the country 's population ). It is continental Europe 's westernmost capital city and the only one along the Atlantic coast. Lisbon lies in the western Iberian Peninsula on the Atlantic Ocean and the River Tagus. The westernmost areas of its metro area form the westernmost point of Continental Europe, which is known as Cabo da Roca, located in the Sintra Mountains.
Lisbon is recognised as a alpha -level global city by the Globalization and World Cities (GaWC) Study Group because of its importance in finance, commerce, media, entertainment, arts, international trade, education and tourism. Lisbon is the only Portuguese city besides Porto to be recognised as a global city. It is one of the major economic centres on the continent, with a growing financial sector and one of the largest container ports on Europe 's Atlantic coast. Additionally, Humberto Delgado Airport served 26.7 million passengers in 2017, being the busiest airport in Portugal, the 3rd busiest in the Iberian Peninsula and the 20th busiest in Europe, and the motorway network and the high-speed rail system of Alfa Pendular links the main cities of Portugal (such as Braga, Porto and Coimbra) to Lisbon.