Mehdiabad () is a village in Zarrin Gol Rural District of the Central District in Aliabad-e Katul County, Golestan province, Iran.
At the time of the 2006 National Census, the village's population was 2,748 in 618 households. The following census in 2011 counted 2,909 people in 774 households. The 2016 census measured the population of the village as 2,848 people in 860 households. It was the most populous village in its rural district.