Within the electoral divisions of Chile, Buin is represented in the Chamber of Deputies by Ramón Farías (PPD) and José Antonio Kast (UDI) as part of the 30th electoral district, (together with San Bernardo, Paine and Calera de Tango).
Within the electoral divisions of Chile, Buin is represented in the Chamber of Deputies by Ramón Farías (PPD) and José Antonio Kast (UDI), which includes the 30th electoral district along with San Bernardo, Paine, and Calera de Tango.