Sar Darreh () is a village in Seydun-e Shomali Rural District of the Central District of Seydun County, Khuzestan province, Iran.
At the time of the 2006 National Census, the village's population was 962 in 181 households, when it was in Seydun District of Bagh-e Malek County. The following census in 2011 counted 957 people in 199 households. The 2016 census measured the population of the village as 868 people in 201 households. It was the most populous village in its rural district.
In 2022, the district was separated from the county in the establishment of Seydun County and renamed the Central District.