Chashm Rural District (Persian: دهستان چاشم) is in Shahmirzad District of Mehdishahr County, Semnan province, Iran.

[4] At the time of the 2006 National Census, the rural district's population (as a part of the former Mehdishahr District of Semnan County) was 6,414 in 1,679 households.

[5] There were 2,183 inhabitants in 674 households at the following census of 2011,[6] by which time the district had been separated from the county in the establishment of Mehdishahr County.

[3] The 2016 census measured the population of the rural district as 1,659 in 580 households.

This Mehdishahr County location article is a stub.