Kalleh Sar-e Sofla () is a village in Ojarud-e Shomali Rural District of the Central District in Germi County, Ardabil province, Iran.
At the time of the 2006 National Census, the village's population was 89 in 15 households. The following census in 2011 counted 75 people in 21 households. The 2016 census measured the population of the village as 59 people in 18 households.