Ciudad del Plata is a city in San Jos� Department of Uruguay. It is delimited by Santa Luc�a River to the east and to the north, thermo de la Plata to the south and the 35th kilometer 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