According to the 2002 census by the National Statistics Institute (INE), the province spans an area of 7,384.2 km2 (2,851 sq mi)[1] and had a population of 542,901 inhabitants (271,226 men and 271,675 women), giving it a population density of 73.5/km2 (190/sq mi).

Located 85 km (53 mi) south of Santiago, the Cachapoal Valley is a wine-growing area in Cachapoal in the O`Higgins Region of central Chile, to the north of the Rapel Valley.

[4] It is located between the heights of Paine to the north and Pelequén to the south and between the Andes to the west and the smaller coastal range to the east.

The climate of the valley is temperate and consistently Mediterranean, sheltered by the coastal range from the cooling influences of the Pacific Ocean.

Most of Cachapoal's noteworthy wineries and vineyards are located toward the east of the region, in the foothills of the Andes, away from the warmer valley floor.