Quillacollo is a province in the Cochabamba Department, Bolivia. It is known for its festival in August where people from all over Bolivia come and pay homage to the Virgin of Urqupiña (Virgen de Urqupiña). Quillacollo is said to be one of the fastest-growing cities in Bolivia.
One of the highest peaks of the province is Tunari at . Other mountains are listed below:
The province is divided into five municipalities which are further subdivided into cantons.
The languages spoken in the Quillacollo Province are mainly Spanish and Quechua. The following table shows the number of those belonging to the recognized group of speakers.