 The demonym for a person from Chillán Viejo is "Chillanvejano" or "Chillanvejana" for a woman.Chillán Viejo was the birthplace of Francisco Núñez de Pineda y Bascuñán in 1607 and Bernardo O'Higgins in 1778.As a commune, Chillán Viejo is a third-level administrative division of Chile administered by a municipal council, headed by an alcalde who is directly elected every four years.