Mehdiabad () is a village in Roshtkhar Rural District of the Central District in Roshtkhar County, Razavi Khorasan province, Iran.
At the time of the 2006 National Census, the village's population was 1,584 in 362 households. The following census in 2011 counted 1,634 people in 441 households. The 2016 census measured the population of the village as 1,615 people in 485 households.