Kohgiluyeh and Boyer-Ahmad Province (,
Ostan-e Kohgiruye-o Buyer-Ahmad ) is one of the thirty-one
provinces of
Iran. It is in the south-west of the country, in Iran's
Region 2, and its capital is
Yasuj. The province covers an area of 15,563 square kilometers, and in 2006 had a population of 634,000. According to National Population and Housing Census population of Kohgiluyeh and Boyer-Ahmad in 2011 was 658,629. The people mainly speak
Lurish language.