Hamayi-ye Sofla () is a village in Kuh Hamayi Rural District of Rud Ab District in Sabzevar County, Razavi Khorasan province, Iran.
At the time of the 2006 National Census, the village's population was below the reporting threshold. The village did not appear in the following census of 2011. The 2016 census measured the population of the village as 50 people in 24 households.