Tourism in Portugal serves millions of international and domestic tourists. Tourists visit to see cities, historic landmarks, enjoy beaches, or religious sites. As of 2019, Portugal had 27 million visitors. The most popular destinations were Lisbon, Porto, the Algarve, the Portuguese Riviera, Madeira, Sintra, Óbidos and Fátima. The most popular with internationals were Lisbon, the Algarve and Northern Portugal. National tourists prefer Northern Portugal, followed by Central Portugal and the Algarve.

The Portuguese Riviera is a term used in the tourist industry for the affluent coastal region to the west of Lisbon, Portugal, centered on the coastal municipalities of Cascais, Oeiras and Sintra. It is coterminous with the Estoril Coast and occasionally known as the Costa do Sol. Portuguese themselves do not use this expression.