Talcahuano is a port city and commune in the Biobio Region of Chile. It is part of the Greater Concepcion conurbation. Talcahuano is located in the south of the Central Zone of Chile. Together with ten other municipalities, it forms part of the Concepcion Province, which in turn is one of four provinces that forms the VIII Region of Biobio Region.
According to the 2002 census of the National Statistics Institute, Talcahuano spans an area of 145.8 km2 (56 sq mi) and has 250,348 inhabitants (121,778 men and 128,570 women). Of these, 248,964 (99.4%) lived in urban areas and 1,384 (0.6%) in rural areas. The population grew by 59.9% (93,766 persons) between the 1992 and 2002 censuses. With a population density of 1,873 inhabitants per square kilometre, it is the seventh most populated city of the country.