Ciudad del Plata is a city in San José Department of Uruguay. It is delimited by Santa Lucía River to the east and to the north, the Río de la Plata to the south and the 35th kilometre of the Route 1 also named "Brigadier General Manuel Oribe". Its population in 2006 was approximately 26,000 inhabitants. It has a big concentration of industries, while during the 2011 census its population was 31,145.