According to INDEC, the population of Mar del Tuyú was 6,916 in 2001, including (Costa del Este). It is included in a metropolitan area with Santa Teresita, raising the area's population to 19,950 inhabitants (INDEC, 2001).
The town was founded in 1945 by Arturo D'Elías. Upon the designation of the La Costa District in by the military-appointed Governor, Gen. Ibérico Saint Jean, in 1978, Mar del Tuyu was chosen as the county seat to avoid disputes between residents of the county's northernmost town, San Clemente del Tuyú, and the southernmost, Mar de Ajó (both of which are the largest in the district).
The Ovals - One of the urban characteristics of Mar del Tuyú, that break the monotony of square blocks with occasional oval-shaped spaces. In these ovals, there are beautiful buildings, shopping malls, and the Municipal Palace, former site of the Gran Hotel Tuyú
Fishing dock - 100 meters long and 4 meter wide, with a 10 by 20 meter point to fish from. It is made from wood, can float from 4 to 6 meters high, with street lighting, cabins for rent, and public bathrooms.
Lighthouse - 25 meters high, with a light that can reach a distance of 36 kilometers. It is of high importance for coastal navigation, particularly for fishing boats.
