Cachapoal Province

Cachapoal Province () is one of three provinces of the central Chilean region of Libertador General Bernardo O'Higgins (VI). Its capital is the city of Rancagua.
The province is named after the Cachapoal river that flows through the province from east to west.
Geography.
The Cachapoal province has an area of , the largest province in the O'Higgins region.
Cachapoal is a landlocked province (it does not border the ocean) and is bordered to the north by the Santiago Metropolitan region, to the east by Argentina, to the south by the Colchagua province and to the west by the Cardenal Caro province.
Most of the province is in the valley of the Cachapoal river; it is region where grapes are grown to produce wine.
Population.
The people from the province are called "Cachapoalino" (women: "Cachapoalina").
 (last national census), there were 542,901 people living in the province, giving it a population density of inhabitants/km².
The largest city of the province is Rancagua, its capital, with a population, in 2002, of 206,971 inhabitants, followed by the city of Rengo (30,891 inhabitants).
Administration.
As a province, Cachapoal is a second-level administrative division, consisting of 17 communes ("comunas"). The city of Rancagua serves as the provincial capital. The province is administered by a governor.