Susan District () is in Izeh County, Khuzestan province, Iran. Its capital is the village of Torshak.
After the 2006 National Census, Susan-e Gharbi and Susan-e Sharqi Rural Districts were separated from the Central District in the formation of Susan District.
At the time of the 2011 census, the district's population was 15,192 people in 2,919 households. The 2016 census measured the population of the district as 12,953 inhabitants in 2,642 households.