As a commune, Sierra Gorda is a third-level administrative division of Chile administered by a municipal council, headed by an alcalde who is directly elected every four years. The 2008-2012 alcalde is José GuerreroVenegas.
Within the electoral divisions of Chile, Sierra Gorda is represented in the Chamber of Deputies by Mr. Pedro Araya (PRI) and Mr. Manuel Rojas (UDI) as part of the 4th electoral district, (together with Antofagasta, Mejillones and Taltal). The commune is represented in the Senate by Carlos Cantero Ojeda (Ind.) and José Antonio Gómez Urrutia (PRSD) as part of the 2nd senatorial constituency (Antofagasta Region).