Pirque is a commune of Chile in Cordillera Province, Santiago Metropolitan Region; it is located 2.8 kilometers SE of Puente Alto and 21.3 kilometers SSE of the center of Santiago. It is situated in a mountain chain. 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). Of these, 9,651 (58.3%) lived in urban areas and 6,914 (41.7%) in rural areas. The population grew by 45.7% (5,197 persons) between the 1992 and 2002 censuses.