Chashm

Chashm is a village in, and the capital of, Chashm Rural District of Shahmirzad District, Mehdishahr County, Semnan province, Iran.

At the 2006 National Census, its population was 483 in 126 households, when it was in the former Mehdishahr District of Semnan County). The following census in 2011 counted 725 people in 222 households, by which time the district had been separated from the county in the establishment of Mehdishahr County. The latest census in 2016 showed a population of 566 people in 196 households; it was the most populous village in its rural district.