Nam Kul () is a village in Zirtang Rural District of Kuhnani District, Kuhdasht County, Lorestan province, Iran.
At the time of the 2006 National Census, the village's population was 724 in 151 households. The following census in 2011 counted 737 people in 182 households. The 2016 census measured the population of the village as 638 people in 187 households. It was the most populous village in its rural district.