Ab Alvan
Ab Alvan (, also Romanized as Āb Alvān) is a village in, and the capital of, Ab Alvan Rural District of Sar Asiab-e Yusefi District, Bahmai County, Kohgiluyeh and Boyer-Ahmad province, Iran.

At the 2006 National Census, its population was 647 in 127 households, when it was in Sar Asiab-e Yusefi Rural District of Bahmai-ye Garmsiri District. The following census in 2011 counted 474 people in 100 households. The latest census in 2016 showed a population of 253 people in 59 households.

After the census, the rural district was separated from the district in the establishment of the new Sar Asiab-e Yusefi District, which was divided into two rural districts and the city of Sar Asiab-e Yusefi, which became its capital.

References 

Bahmai County
Populated places in Kohgiluyeh and Boyer-Ahmad Province
Populated places in Bahmai County