Arani Municipality is the first municipal section of the Arani Province in the Cochabamba Department, Bolivia. Its seat is Arani. At the time of census 2001, the municipality had 11,542 inhabitants.
It is bordered to the north by the Tiraque Province, to the east by the Vacas Municipality, to the south by the Mizque Province and to the west by the Punata Province.
The municipality consists of the following three cantons:
The people are predominantly indigenous citizens of Quechua descent.
Every year on August 24 the population of Arani celebrates one of its most important Catholic festivities, Virgen La Bella, dedicated to the Virgin Mary, whose image is venerated with much devotion by the residents and people from abroad.