Sahlabad () is a village in Sahlabad Rural District of Sardaran District, Nehbandan County, South Khorasan province, Iran.
At the time of the 2006 National Census, the village's population was 10 in four households, when it was in Shusef Rural District of Shusef District. The following census in 2011 counted 17 people in six households. The 2016 census measured the population of the village as below the reporting threshold.
In 2020, Kalateh-ye Aliabad was separated from the district in the formation of Sardaran District and transferred to Sahlabad Rural District created in the new district.