The Central District of Hamun County () is in Sistan and Baluchestan province, Iran. Its capital is the city of Mohammadabad.
In 2013, Shib Ab District was separated from Zabol County in the establishment of Hamun County, which was divided into two districts of two rural districts each, with Mohammadabad as its capital. After the 2016 National Census, Shahr-e Jadid-e Ramshar was elevated to the status of a city.
At the time of the 2016 census, the district's population was 34,570 inhabitants in 9,397 households.