Mohammadabad (Persian: محمدآباد) is a city in the Central District of Rigan County, Kerman province, Iran, serving as capital of both the county and the district. It is also the administrative center for Rigan Rural District.

At the 2006 National Census, its population was 5,773 in 1,295 households, when it was in the former Rigan District of Bam County. The following census in 2011 counted 9,664 people in 2,856 households, by which time the city had been separated from the county in the establishment of Rigan County, with Mohammadabad as its capital. The latest census in 2016 showed a population of 20,720 people in 4,828 households.