Chahar Deh () is a village in Salami Rural District of Salami District in Khaf County, Razavi Khorasan province, Iran.
At the time of the 2006 National Census, the village's population was 1,292 in 233 households. The following census in 2011 counted 1,449 people in 314 households. The 2016 census measured the population of the village as 1,618 people in 376 households.