Shur Ab-e Sofla () is a village in Pol Khatun Rural District of Marzdaran District in Sarakhs County, Razavi Khorasan province, Iran.
At the time of the 2006 National Census, the village's population was 228 in 42 households. The following census in 2011 counted 163 people in 37 households. The 2016 census measured the population of the village as 170 people in 45 households.