It is situated at the base of the Cajón del Maipo, and is the home of the Concha y Toro wine company.

According to the 2002 census of the National Statistics Institute, Pirque spans an area of 445.3 km2 (172 sq mi) and has 16,565 inhabitants (8,384 men and 8,181 women).

[1] As a commune, Pirque 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 communal council has the following members: Within the electoral divisions of Chile, Pirque is represented in the Chamber of Deputies by Mr. Osvaldo Andrade (PS) and Mr. Leopoldo Pérez (RN) as part of the 29th electoral district, (together with Puente Alto, San José de Maipo and La Pintana).

The commune is represented in the Senate by Soledad Alvear Valenzuela (PDC) and Ena Von Baer (UDI) as part of the 8th senatorial constituency (Santiago-East).