Chahar Bagh () is a village in Shirin Su Rural District of Shirin Su District in Maneh County, North Khorasan province, Iran.
At the time of the 2006 National Census, the village's population was 405 in 83 households, when it was in Maneh District of Maneh and Samalqan County. The following census in 2011 counted 378 people in 95 households. The 2016 census measured the population of the village as 508 people in 109 households.
In 2023, the district was separated from the county in the establishment of Maneh County and renamed the Central District. The rural district was transferred to the new Shirin Su District.