Arqin Bolagh () is a village in Zarrineh Rud Rural District of Bezineh Rud District in Khodabandeh County, Zanjan province, Iran.
At the time of the 2006 National Census, the village's population was 954 in 204 households. The following census in 2011 counted 889 people in 259 households. The 2016 census measured the population of the village as 728 people in 217 households.