Ciudad de la Costa is a city in Canelones Department of Uruguay, on the banks of the Río de la Plata between the streams Arroyo Carrasco and Arroyo Pando. It is considered an extension of the metropolitan area of Montevideo which it borders to the west, while to the east it borders Costa de Oro. It was declared a city on 19 October 1994 and given its current name. At the 2011 census, it was the third most populated city of Uruguay.