Eresk District () is in Boshruyeh County, South Khorasan province, Iran. Its capital is the city of Eresk.
In 2008, Boshruyeh District was separated from Ferdows County in the establishment of Boshruyeh County, which was divided into two districts of two rural districts each, with the city of Boshruyeh as its capital.
At the time of the 2011 National Census, the district's population was 5,843 people in 1,761 households. The 2016 census measured the population of the district as 5,973 inhabitants in 2,018 households.