Poshtkuh Rural District (Mehdishahr County)

Poshtkuh Rural District is in Shahmirzad District of Mehdishahr County, Semnan province, Iran. Its capital is the village of Fulad Mahalleh.

At the National Census of 2006, its population (as a part of the former Mehdishahr District of Semnan County) was 1,825 in 561 households. There were 5,717 inhabitants in 1,609 households at the following census of 2011, by which time the district had been separated from the county in the establishment of Mehdishahr County. At the most recent census of 2016, the population of the rural district was 3,844 in 1,326 households. The most populous of its 68 villages was Fulad Mahalleh, with 2,518 people.