Asiab (Persian: اسياب) is a village in, and the capital of, Asiab Rural District of the Central District of Omidiyeh County, Khuzestan province, Iran.

At the 2006 National Census, its population was 780 in 170 households. The following census in 2011 counted 748 people in 210 households. The latest census in 2016 showed a population of 694 people in 191 households. It was the most populous village in its rural district.