Karezan District () is in Sirvan County, Ilam province, Iran. Its capital is the village of Cheshmeh Pahn.
In 2013, Shirvan District was separated from Chardavol County in the establishment of Sirvan County, which was divided into two districts of two rural districts each, with Lumar as its capital and only city.
It is populated by Kurds from the Khezel tribe.
At the time of the 2016 National Census, the district's population was 7,252 inhabitants in 1,958 households.