The Province of Kohkilouyeh va Boyer Ahmad with an area of 15,563 square kilometers is located in central southwestern Iran. Based on the latest divisions of the country in 1996, the cities of this province are as follows: Kohkilouyeh (with its center as Dehdasht), Boyer Ahmad (with its center as Yasooj) and Gachsaran. Yasooj is the provincial capital. This province is limited in the north by the Province of Chahar Mahal va Bakhtiyari, and in the south are
the provinces of Fars and Bushehr. In the east the Province of Esfahan and to the west it is in the neighborhood of Khuzestan Province .
In 1996, this province has a population of 544,000. Out of this 39.2% lived in the urban and 60.2% lived in the rural areas, the remaining being non-residents.