Costa Rica, officially the Republic of Costa Rica, is a country in Central America. It borders Nicaragua to the north, the Caribbean Sea to the northeast, Panama to the southeast, and the Pacific Ocean to the southwest, as well as maritime border with Ecuador to the south of Cocos Island. It has a population of around five million in a land area of nearly 51,180 km2 (19,760 sq mi). An estimated 352,381 people live in the capital and largest city, San José, with around two million people in the surrounding metropolitan area.