Mehdiabad () is a village in Salari Rural District of Belharat District in Miyan Jolgeh County, Razavi Khorasan province, Iran.
At the time of the 2006 National Census, the village's population was 269 in 68 households, when it was in Belharat Rural District of the former Miyan Jolgeh District in Nishapur County. The following census in 2011 counted 263 people in 81 households. The 2016 census measured the population of the village as 247 people in 76 households.
In 2023, the district was separated from the county in the establishment of Miyan Jolgeh County and renamed the Central District. The rural district was transferred to the new Belharat District, and Mehdiabad was transferred to Salari Rural District created in the same district.