According to the 2002 census of the National Statistics Institute, Lautaro spans an area of 901.1 km2 (348 sq mi) and has 32,218 inhabitants (15,991 men and 16,227 women). Of these, 21,071 (65.4%) lived in urban areas and 11,147 (34.6%) in rural areas. Between the 1992 and 2002 censuses, the population grew by 12.2% (3,493 persons).
As a commune, Lautaro is a third-level administrative division of Chile administered by a communal council headed by an alcalde who is directly elected every four years. For the years 2008-2012, the alcalde is Renato Hauri, and the council members are: