Cusco, often spelled Cuzco, is a city in southeastern Peru, near the Urubamba Valley of the Andes mountain range. It is the capital of the Cusco Region and of the Cusco Province. The city is the seventh most populous in Peru, and in 2017 it had a population of 428,450. Located on the eastern end of the Knot of Cuzco, its elevation is around 3400 m.