Silves is a city and municipality in the Portuguese region of Algarve, in southern Portugal. The population of the entire municipality of Silves in 2011 was 37,126, in an area of 680.06 km2. The urbanized area of the city proper has approximately 11,000 inhabitants. Silves is the former capital of the Kingdom of the Algarve, a nominal kingdom within the Kingdom of Portugal, and is of great historical importance.