Cascais (Portuguese pronunciation: [kɐʃˈkajʃ]) is a city and municipality in the Greater Lisbon region of Portugal, located on the Portuguese Riviera. The population in 2011 was 206,479, in an area of 97.40 km2. Cascais is a cosmopolitan center of the Portuguese Riviera, a major tourist destination, and one of Portugal's most desirable real estate markets.
Cascais's history as a cosmopolitan haven for the rich and famous originates in the 1870s, when King Luís I of Portugal and the Portuguese royal family made the seaside town their summer residence, thus attracting members of the Portuguese aristocracy, who established a summer community there. Cascais is famous for the numerous kings and royal families that have called it home, including King Edward VIII of the United Kingdom, King Juan Carlos I of Spain, and King Umberto II of Italy.
Today, Cascais is one of the wealthiest municipalities in both Portugal and the Iberian Peninsula. Similarly, it is home to one of the most expensive real estate markets and costs of living in the country, as well as a sizable international community. Cascais is consistently ranked for its high quality of living, making it one of the most livable places in Portugal.